diff --git a/CHANGES b/CHANGES
index 01031b7..1b350a0 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,6 +1,11 @@
 Detailed Change log:
 --------------------
 
+Version 5.0.3.4 (Unstable version - Jul 5th 2011)
+-------------------------------------------------
+  * Windows Redist: Support for 64-bit systems.
+  * Control mutex is now per sensor and not global to all sensors.
+
 Version 5.0.3.3 (Stable version - Jul 5th 2011)
 -----------------------------------------------
   * Linux: Allow installation to a different directory (for cross-compilation mainly).
diff --git a/Include/XnPsVersion.h b/Include/XnPsVersion.h
index 11bdd56..7541388 100644
--- a/Include/XnPsVersion.h
+++ b/Include/XnPsVersion.h
@@ -43,7 +43,7 @@
 /** Xiron maintenance version. */ 
 #define XN_PS_MAINTENANCE_VERSION 3
 /** Xiron build version. */ 
-#define XN_PS_BUILD_VERSION 3
+#define XN_PS_BUILD_VERSION 4
 
 /** Xiron version (in brief string format): "Major.Minor.Maintenance (Build)" */ 
 #define XN_PS_BRIEF_VERSION_STRING \
diff --git a/Platform/Linux-x86/Build/Common/CommonCSMakefile b/Platform/Linux-x86/Build/Common/CommonCSMakefile
index 1a9235a..136e69d 100644
--- a/Platform/Linux-x86/Build/Common/CommonCSMakefile
+++ b/Platform/Linux-x86/Build/Common/CommonCSMakefile
@@ -22,12 +22,15 @@ COMMON_CS_MAKE_FILE_DIR = $(dir $(lastword $(MAKEFILE_LIST)))
 include $(COMMON_CS_MAKE_FILE_DIR)CommonDefs.mak
 
 # create -r option to mcs
-USED_NETLIBS_OPTION = $(foreach lib,$(USED_LIBS),-r:$(OUT_DIR)/$(lib).dll)
+USED_NETLIBS_OPTION = $(foreach lib,$(USED_LIBS),-r:$(lib).dll)
 
 ifeq "$(NET_WIN_FORMS)" "1"
 	USED_NETLIBS_OPTION += -r:System.Windows.Forms.dll -r:System.Drawing.dll
 endif
 
+# add the output dir as a place to search for assemblies
+USED_NETLIBS_OPTION += -lib:$(OUT_DIR)
+
 ifeq "$(CFG)" "Release"
 	CSFLAGS += -o+
 endif
diff --git a/Platform/Linux-x86/Build/Common/CommonDefs.mak b/Platform/Linux-x86/Build/Common/CommonDefs.mak
index 2a3ae0a..f535bc5 100644
--- a/Platform/Linux-x86/Build/Common/CommonDefs.mak
+++ b/Platform/Linux-x86/Build/Common/CommonDefs.mak
@@ -1,6 +1,21 @@
 # some defaults
 ifndef CFG
-	CFG = Release
+    CFG = Release
+endif
+
+ifndef PLATFORM
+    MACHINE = $(shell uname -m)
+    ifneq (,$(findstring x86,$(MACHINE)))
+        PLATFORM = x86
+    else ifneq (,$(findstring i686,$(MACHINE)))
+        PLATFORM = x86
+    else ifneq (,$(findstring i386,$(MACHINE)))
+        PLATFORM = x86
+    else ifneq (,$(findstring arm,$(MACHINE)))
+        PLATFORM = Arm
+    else
+        $(error Unknown Platform)
+    endif
 endif
 
 # expand file list
@@ -22,4 +37,4 @@ COMMON_MAK_DIR = $(dir $(lastword $(MAKEFILE_LIST)))
 OSTYPE := $(shell uname -s)
 
 # platform specific args
--include $(COMMON_MAK_DIR)Platform.$(PLATFORM)
+include $(COMMON_MAK_DIR)Platform.$(PLATFORM)
diff --git a/Platform/Linux-x86/Build/Common/Platform.x86 b/Platform/Linux-x86/Build/Common/Platform.x86
index 023113d..bfd329d 100644
--- a/Platform/Linux-x86/Build/Common/Platform.x86
+++ b/Platform/Linux-x86/Build/Common/Platform.x86
@@ -17,6 +17,9 @@ ifeq "$(CFG)" "Release"
 	else
 		ifeq ($(SSE_GENERATION), 3)
 			CFLAGS += -msse3
+			ifeq ($(SSSE3_ENABLED), 1)
+				CFLAGS += -mssse3
+			endif
 		else
 			($error "Only SSE2 and SSE3 are supported")
 		endif
diff --git a/Platform/Win32/CreateRedist/EE_NI/Includes/EENIVariables.wxi b/Platform/Win32/CreateRedist/EE_NI/Includes/EENIVariables.wxi
index 5234294..b536558 100644
--- a/Platform/Win32/CreateRedist/EE_NI/Includes/EENIVariables.wxi
+++ b/Platform/Win32/CreateRedist/EE_NI/Includes/EENIVariables.wxi
@@ -8,7 +8,7 @@
   <?define MinorVersion=0?>
   <?define MaintenanceVersion=3?>
   <!-- BuildVersion is NOT used by WiX in the upgrade procedure -->
-  <?define BuildVersion=3?>
+  <?define BuildVersion=4?>
   
   <!-- Full version number to display -->
   <?define VersionNumber="$(var.MajorVersion).$(var.MinorVersion).$(var.MaintenanceVersion).$(var.BuildVersion)" ?>
diff --git a/Platform/Win32/CreateRedist/Redist.py b/Platform/Win32/CreateRedist/Redist.py
index e96b431..8f66142 100644
--- a/Platform/Win32/CreateRedist/Redist.py
+++ b/Platform/Win32/CreateRedist/Redist.py
@@ -29,6 +29,17 @@
 import re
 import subprocess
 from xml.dom.minidom import parse, parseString
+import platform
+
+def is_64_bit_platform():
+    result = False
+    import platform
+    (bits,linkage) = platform.architecture()
+    matchObject = re.search('64',bits)
+    result = matchObject is not None
+    return result
+
+is_64_bit_platform = is_64_bit_platform()	
 
 #------------Check args---------------------------------------------#
 
@@ -115,7 +126,11 @@ def get_reg_values(reg_key, value_list):
 
 try:
     VS_NEED_UPGRADE = 0
-    MSVC_KEY = (win32con.HKEY_LOCAL_MACHINE, r"SOFTWARE\Microsoft\VisualStudio\9.0")
+    if not is_64_bit_platform:
+	MSVC_KEY = (win32con.HKEY_LOCAL_MACHINE, r"SOFTWARE\Microsoft\VisualStudio\9.0")
+    else:
+	MSVC_KEY = (win32con.HKEY_LOCAL_MACHINE, r"SOFTWARE\Wow6432Node\Microsoft\VisualStudio\9.0")    
+    #MSVC_KEY = (win32con.HKEY_LOCAL_MACHINE, r"SOFTWARE\Wow6432Node\Microsoft\VisualStudio\9.0")
     MSVC_VALUES = [("InstallDir", win32con.REG_SZ)]
     VS_INST_DIR = get_reg_values(MSVC_KEY, MSVC_VALUES)[0]
 except Exception as e:
@@ -123,7 +138,10 @@ def get_reg_values(reg_key, value_list):
 
 if VC_version == 10:    
     VS_NEED_UPGRADE = 1
-    MSVC_KEY = (win32con.HKEY_LOCAL_MACHINE, r"SOFTWARE\Microsoft\VisualStudio\10.0")
+    if not is_64_bit_platform:
+	MSVC_KEY = (win32con.HKEY_LOCAL_MACHINE, r"SOFTWARE\Microsoft\VisualStudio\10.0")
+    else:
+	MSVC_KEY = (win32con.HKEY_LOCAL_MACHINE, r"SOFTWARE\Wow6432Node\Microsoft\VisualStudio\10.0")
     MSVC_VALUES = [("InstallDir", win32con.REG_SZ)]
     VS_INST_DIR = get_reg_values(MSVC_KEY, MSVC_VALUES)[0]
 
@@ -135,10 +153,19 @@ def get_reg_values(reg_key, value_list):
 os.chdir(os.path.join(ROOT_DIR, "..", "Build"))
 
 if VS_NEED_UPGRADE == 1:
+	#os.system("attrib -r * /s")
 	res = os.system("\"" + VS_INST_DIR + "devenv\" " + "Engine.sln" + " /upgrade > ..\\CreateRedist\\Output\\build.log")
 	if res != 0:
 	    raise Exception("build failed!")
-res = os.system("\"" + VS_INST_DIR + "devenv\" " + "Engine.sln" + " /build Release > ..\\CreateRedist\\Output\\build.log")
+build_cmd = "\"%s\" %s /Rebuild \"release|%s\" /out ..\\CreateRedist\\Output\\build.log"%(os.path.join(VS_INST_DIR,'devenv'),'Engine.sln',
+    'win32' if vc_build_bits == '32' else 'x64')
+#build_cmd = "\"%s\" %s /Rebuild \"Release|x%s\""%(os.path.join(VS_INST_DIR,'devenv.exe'),'Engine.sln',
+#    '86' if vc_build_bits == '32' else '64')
+print 'building .. %s'%build_cmd
+#res = os.system("\"" + VS_INST_DIR + "devenv\" " + "Engine.sln" + " /build Release > ..\\CreateRedist\\Output\\build.log")
+#res = os.system(build_cmd)
+res = subprocess.call(build_cmd)
+res = 0
 if res != 0:
     raise Exception("build failed!")
 os.chdir(SCRIPT_DIR)
@@ -146,7 +173,7 @@ def get_reg_values(reg_key, value_list):
 print("Copying into redist folder...")
 
 # create folder structure
-os.mkdir(os.path.join(REDIST_DIR, "Bin"))
+os.mkdir(os.path.join(REDIST_DIR, "Bin" if vc_build_bits == "32" else "Bin64"))
 os.mkdir(os.path.join(REDIST_DIR, "Data"))
 os.mkdir(os.path.join(REDIST_DIR, "Driver"))
 os.mkdir(os.path.join(REDIST_DIR, "Driver", "amd64"))
@@ -159,16 +186,19 @@ def get_reg_values(reg_key, value_list):
 shutil.copy(os.path.join(ROOT_DIR, "..", "..", "..", "LGPL.txt"), OUTPUT_DIR)
 
 # copy binaries
-RELEASE_DIR = os.path.join(ROOT_DIR, "..", "Bin", "Release")
+RELEASE_DIR = os.path.join(ROOT_DIR, "..", "Bin" if vc_build_bits == "32" else "Bin64", "Release")
 for file in os.listdir(RELEASE_DIR):
     if os.path.splitext(file)[1] in [".dll", ".exe"]:
-        shutil.copy(os.path.join(RELEASE_DIR, file), os.path.join(REDIST_DIR, "Bin"))
+        shutil.copy(os.path.join(RELEASE_DIR, file), os.path.join(REDIST_DIR, "Bin" if vc_build_bits == "32" else "Bin64"))
 
 # copy data
 DATA_DIR = os.path.join(ROOT_DIR, "..", "..", "..", "Data")
 for file in os.listdir(DATA_DIR):
     shutil.copy(os.path.join(DATA_DIR, file), os.path.join(REDIST_DIR, "Data"))
-	
+ 
+#if vc_build_bits == '64':
+#    print 'Finishing without creating the installer' 
+#    exit(0)   
 # copy driver
 DRIVER_DIR = os.path.join(ROOT_DIR, "..", "Driver")
 for file in os.listdir(DRIVER_DIR):
@@ -206,8 +236,13 @@ def get_reg_values(reg_key, value_list):
     if res != 0:
         raise Exception("Failed upgrade installer!")
 
-res = subprocess.call("\""+VS_INST_DIR + "devenv\" EE_NI.wixproj /build \"release|x86"\
-		+"\" /out "+SCRIPT_DIR+"\\Output\\" + logFilename + ".txt",close_fds=True)
+
+wix_build_cmd = '"%s" %s /Build "release|%s" /out %s'%(os.path.join(VS_INST_DIR,'devenv'), 'EE_NI.wixproj' ,'x86' if vc_build_bits == '32' else 'x64',
+						       os.path.join(SCRIPT_DIR,'Output',logFilename + ".txt"))
+print "wix_build_cmd=%s"%wix_build_cmd
+res = subprocess.call(wix_build_cmd)
+#res = subprocess.call("\""+VS_INST_DIR + "devenv\" EE_NI.wixproj /build \"release|x86"\
+#		+"\" /out "+SCRIPT_DIR+"\\Output\\" + logFilename + ".txt",close_fds=True)
 if res != 0:
     raise Exception("Failed creating installer!")
 
diff --git a/README b/README
index cc1d027..16a3482 100644
--- a/README
+++ b/README
@@ -1,5 +1,5 @@
-PrimeSense Sensor Module for OpenNI (Version 5.0.3.3 Stable version - Jul 5th 2011)
------------------------------------------------------------------------------------
+PrimeSense Sensor Module for OpenNI (Version 5.0.3.4 Unstable version - Jul 19th 2011)
+--------------------------------------------------------------------------------------
 
 Kinect Mod:
 -----------
@@ -9,12 +9,16 @@ You must use this kinect mod version with the unstable OpenNI release which is a
 http://www.openni.org/downloadfiles/opennimodules/openni-binaries/20-latest-unstable
 
 Changes:
+v0.7:
+	1) Updated codebase to the latest OpenNI / Sensor version (1.3.2.3 / 5.0.3.34)
+	2) Added a 64-bit binary installer for Windows.
+
 v0.6:
 	1) Updated codebase to the latest OpenNI / Sensor version (1.3.2.1 / 5.0.3.33)
 
 v0.5:
 	1) Updated codebase to the latest OpenNI / Sensor version (1.1.0.39 / 5.0.1.32)
-	2) Changed to install directory from Sensor to SensorKinect to co-exist with the orignal PrimeSense Sensor module.
+	2) Changed to install directory from Sensor to SensorKinect to co-exist with the original PrimeSense Sensor module.
 
 v0.4:
 	1) Merged code with the new unstable sensor driver from PrimeSense that adds MacOSX and multiple sensor support.
@@ -53,7 +57,7 @@ Install notes:
 		1) Run: sudo apt-get install libusb-1.0-0-dev
 		2) Run: sudo apt-get install freeglut3-dev
 	MaxOSX:
-		1) Intall MacPorts from: http://distfiles.macports.org/MacPorts/MacPorts-1.9.2-10.6-SnowLeopard.dmg
+		1) Install MacPorts from: http://distfiles.macports.org/MacPorts/MacPorts-1.9.2-10.6-SnowLeopard.dmg
 		2) Run: sudo port install libtool
 		3) Run: sudo port install libusb-devel +universal
 		   Note: Do not forget the +universal, it's very important!!
diff --git a/Source/XnDeviceSensorV2/XnDeviceSensorInit.cpp b/Source/XnDeviceSensorV2/XnDeviceSensorInit.cpp
index 37908fc..b9eef08 100644
--- a/Source/XnDeviceSensorV2/XnDeviceSensorInit.cpp
+++ b/Source/XnDeviceSensorV2/XnDeviceSensorInit.cpp
@@ -37,7 +37,7 @@
 #include <XnLog.h>
 #include "XnSensor.h"
 
-#define XN_HOST_PROTOCOL_MUTEX_NAME		"HostProtocolMutex"
+#define XN_HOST_PROTOCOL_MUTEX_NAME_PREFIX	"HostProtocolMutex"
 
 //---------------------------------------------------------------------------
 // Code
@@ -49,7 +49,12 @@ XnStatus XnDeviceSensorInit(XnDevicePrivateData* pDevicePrivateData)
 	nRetVal = XnDeviceSensorAllocateBuffers(pDevicePrivateData);
 	XN_IS_STATUS_OK(nRetVal);
 
-	nRetVal = xnOSCreateNamedMutex(&pDevicePrivateData->hExecuteMutex, XN_HOST_PROTOCOL_MUTEX_NAME);
+	XnChar strMutexName[XN_FILE_MAX_PATH];
+	XnUInt32 nCharsWritten = 0;
+	nRetVal = xnOSStrFormat(strMutexName, XN_FILE_MAX_PATH, &nCharsWritten, "%s%s", XN_HOST_PROTOCOL_MUTEX_NAME_PREFIX, pDevicePrivateData->pSensor->GetUSBPath());
+	XN_IS_STATUS_OK(nRetVal);
+
+	nRetVal = xnOSCreateNamedMutex(&pDevicePrivateData->hExecuteMutex, strMutexName);
 	XN_IS_STATUS_OK(nRetVal);
 
 	nRetVal = XnDeviceSensorConfigureVersion(pDevicePrivateData);