Allow installation under linux/wine if using OS override

common.py

@@ -140,7 +140,11 @@ class Globals:
 	PROTON_ERROR_MESSAGE = ("It looks like you have installed the game under Proton or Wine\n"
 							"Please select the game in your Steam Library, right click, choose Properties, then under 'Compatability' force the use of 'Steam Linux Runtime'\n"
 							"For a video showing how to do this, see here: https://www.youtube.com/watch?v=f1GvONkE9S0\n"
-							"\n")
+							"\n"
+	                        "If you deliberately want to install under Proton or Wine, follow the 'Linux Wine' instructions here: https://07th-mod.com/wiki/Higurashi/Higurashi-Part-1---Voice-and-Graphics-Patch/\n"
+	                        "\n")
+
+	PROTON_WITH_ASSETS_OVERRIDE_MESSAGE = "NOTE: Game is running under Proton/Wine, but user has deliberately selected which OS's assets to install, so it is OK"
 
 	CA_CERT_PATH = None
 	URLOPEN_IS_BROKEN = False

higurashiInstaller.py

@@ -436,7 +436,10 @@ def main(fullInstallConfiguration):
 		windowsExePath = os.path.join(fullInstallConfiguration.installPath, windowsExeName)
 		print("Checking for Proton install by checking if identifier {} exists".format(windowsExePath))
 		if os.path.exists(windowsExePath):
-			raise Exception(common.Globals.PROTON_ERROR_MESSAGE)
+			if common.Globals.FORCE_ASSET_OS_STRING is None:
+				raise Exception(common.Globals.PROTON_ERROR_MESSAGE)
+			else:
+				print(common.Globals.PROTON_WITH_ASSETS_OVERRIDE_MESSAGE)
 
 	# The Partial Manual Install option is mainly for Windows, so please don't assume it works properly on Linux/MacOS
 	if modOptionParser.partialManualInstall:

uminekoInstaller.py

@@ -102,8 +102,11 @@ def mainUmineko(conf):
 		gameIsLinuxIdentifierPath = os.path.join(conf.installPath, "lib64/libfreetype.so.6")
 		print("Checking for Proton install by checking if identifier {} is missing".format(gameIsLinuxIdentifierPath))
 		if not os.path.exists(gameIsLinuxIdentifierPath):
-			raise Exception(common.Globals.PROTON_ERROR_MESSAGE +
+			if common.Globals.FORCE_ASSET_OS_STRING is None:
+				raise Exception(common.Globals.PROTON_ERROR_MESSAGE +
 			                "\nIf you are absolutely sure you're not using Proton, create a dummy file at [{}] to bypass this error.".format(gameIsLinuxIdentifierPath))
+			else:
+				print(common.Globals.PROTON_WITH_ASSETS_OVERRIDE_MESSAGE)
 
 	# Create aliases for the temp directories, and ensure they exist beforehand
 	downloadTempDir = conf.subModConfig.modName + " Downloads"