diff --git a/templates/CentOS-6.0-x86_64-minimal/definition.rb b/templates/CentOS-6.0-x86_64-minimal/definition.rb
index c0191a2..88f8c5b 100644
--- a/templates/CentOS-6.0-x86_64-minimal/definition.rb
+++ b/templates/CentOS-6.0-x86_64-minimal/definition.rb
@@ -1,7 +1,7 @@
 Veewee::Session.declare({
   :cpu_count => '1', :memory_size=> '384',
   :disk_size => '10140', :disk_format => 'VDI', :hostiocache => 'off',
-  :os_type_id => 'RedHat_64', :use_vbox_guest_add => true,
+  :os_type_id => 'RedHat_64',
   :iso_file => "CentOS-6.0-x86_64-minimal.iso", :iso_src => "http://be.mirror.eurid.eu/centos/6.0/isos/x86_64/CentOS-6.0-x86_64-minimal.iso", :iso_md5 => "b9fff4dad7aad0edaa564d7a251cb971", :iso_download_timeout => 1000,
   :iso_download_instructions => "We can not download the ISO , you need to download it yourself and put it in the iso directory\n"+
   "- URL: http://isoredirect.centos.org/centos/6/isos/x86_64/ ",
diff --git a/templates/openindiana-148-ai-x86/definition.rb b/templates/openindiana-148-ai-x86/definition.rb
index 32842e7..76aa5f4 100644
--- a/templates/openindiana-148-ai-x86/definition.rb
+++ b/templates/openindiana-148-ai-x86/definition.rb
@@ -1,7 +1,7 @@
 Veewee::Session.declare({
   :cpu_count => '1', :memory_size=> '768',
   #Disk size needs to be 12Gig +
-  :disk_size => '15140', :disk_format => 'VDI', :hostiocache => 'on', :use_hw_virt_ext => 'on',
+  :disk_size => '15140', :disk_format => 'VDI', :hostiocache => 'on', :hwvirtext => 'on',
   :os_type_id => 'OpenSolaris',
   :iso_file => "oi-dev-148-ai-x86.iso",
   :iso_src => "http://dlc.openindiana.org/isos/148/oi-dev-148-ai-x86.iso",
diff --git a/templates/solaris-11-express-i386/definition.rb b/templates/solaris-11-express-i386/definition.rb
index 21786e5..a5bc9d4 100644
--- a/templates/solaris-11-express-i386/definition.rb
+++ b/templates/solaris-11-express-i386/definition.rb
@@ -1,7 +1,7 @@
 Veewee::Session.declare({
   :cpu_count => '1', :memory_size=> '768',
   #Disk size needs to be 12Gig +
-  :disk_size => '15140', :disk_format => 'VDI', :hostiocache => 'off', :use_hw_virt_ext => 'on',
+  :disk_size => '15140', :disk_format => 'VDI', :hostiocache => 'off', :hwvirtext => 'on',
   :os_type_id => 'OpenSolaris',
   :iso_file => "sol-11-exp-201011-ai-x86.iso",
   :iso_src => "",
diff --git a/templates/ubuntu-10.04.3-server-amd64-alt/definition.rb b/templates/ubuntu-10.04.3-server-amd64-alt/definition.rb
index b7fb20c..f8d3a42 100644
--- a/templates/ubuntu-10.04.3-server-amd64-alt/definition.rb
+++ b/templates/ubuntu-10.04.3-server-amd64-alt/definition.rb
@@ -52,6 +52,6 @@
   :ssh_user             => "vagrant",
   :sudo_cmd             => "echo '%p'|sudo -S bash '%f'",
   :shutdown_cmd         => "shutdown -h now",
-  :use_hw_virt_ext      => 'off',
-  :use_pae              => 'on'
+  :hwvirtext      => 'off',
+  :pae              => 'on'
 })
diff --git a/templates/ubuntu-8.04.4-server-amd64/definition.rb b/templates/ubuntu-8.04.4-server-amd64/definition.rb
index 4933e2b..f7ed998 100644
--- a/templates/ubuntu-8.04.4-server-amd64/definition.rb
+++ b/templates/ubuntu-8.04.4-server-amd64/definition.rb
@@ -2,7 +2,7 @@
   :cpu_count => '1', :memory_size=> '384', 
   :disk_size => '10140', :disk_format => 'VDI', :hostiocache => 'off',
   :os_type_id => 'Ubuntu_64',
-  :pae => true, :io_apic_enabled => true,
+  :pae => "on", :ioapic => "on",
   :iso_file => "ubuntu-8.04.4-server-amd64.iso",
   :iso_src => "http://releases.ubuntu.com/8.04.4/ubuntu-8.04.4-server-amd64.iso",
   :iso_md5 => "89fdc8289630fceb036c9818ac19ca4",
diff --git a/templates/ubuntu-8.04.4-server-i386/definition.rb b/templates/ubuntu-8.04.4-server-i386/definition.rb
index 6efa75c..5e4fbe7 100644
--- a/templates/ubuntu-8.04.4-server-i386/definition.rb
+++ b/templates/ubuntu-8.04.4-server-i386/definition.rb
@@ -2,7 +2,7 @@
   :cpu_count => '1', :memory_size=> '384', 
   :disk_size => '10140', :disk_format => 'VDI', :hostiocache => 'off',
   :os_type_id => 'Ubuntu',
-  :pae => true, :io_apic_enabled => true,
+  :pae => "on", :ioapic => "on",
   :iso_file => "ubuntu-8.04.4-server-i386.iso",
   :iso_src => "http://releases.ubuntu.com/8.04.4/ubuntu-8.04.4-server-i386.iso",
   :iso_md5 => "ef478e539e991dfa09c3b5b7c589aba6",