Tricking setups into seeing Windows Server 2003?

[spinjector]

I've seen ways of hacking registry entries & DLL resources to make setup programs think they are running on a different version of windows.

1) Can someone point me to a really good web page about this topic? I've Googled it and I get mountains of useless drive-by crap.

2) Does anyone know of any actual system utilities than will do this automatically? Like with a listbox that says, "Make this copy of Windows appear as: 1) Windows 2000, 2) Windows XP, 3) Windows Server 2003".

Thanks.

FYI - I'm trying to setup up WSUS on a Windows XP machine in a workgroup with no Win2k3 server.

Thanks.