[FileFlags] regini.exe=16It won't change anything if the setup is run from a CD but it makes a huge difference when installing it from HDD.
Adding to TXTSETUP.SIF:
[SourceDisksFiles] regini.exe = 1,,,,,,,2,0,0will make regini.exe copied to %systemroot%\system32. In case of an HDD based installation the file is actually removed from the source at this point. The problem is that some system INF files will actually look for it in the source in the later part of GUI setup. Adding the line under [FileFlags] will prevent the file from being removed from source.
I'm going to update the first post in the next few days in order to summarise everything. I'm still unsure about the Driver Signing settings and driver installation in a running system. Sometimes it doesn't show any warning and sometimes it still does, and I don't know the reason yet.
Edited by tomasz86, 05 October 2012 - 01:46 PM.