For those of you installing Windows Media Center Edition 2005 off MSDN disk 2429.4 (November 2005) and freaked out by it asking for a Windows XP Service Pack 2 (Windows XP SP2) disk, don’t worry: Just select the “skip this file and continue anyway” option because the install doesn’t need wmlauch.ex_ or wmlauch.exe – and I’m lead to believe that Windows XP SP3 will add it, or if not, Automatic Updates will. Just relax, and go with the flow.
I think that’s enough keywords, searching ought to find this now. Oh, hang on: Windows MCE 2005.
BTW, your XP Professional disk with integrated SP2 doesn’t hold the requested file, so don’t bother looking.