This might be a good idea to know if you're a judge on the Add-in contest:
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I installed some Visual Studio.Net 2003 plug-ins a while back. Didn't find them very useful so I decided to uninstall.
Oh sh!te...
All of the sudden when I try and add a new Windows Form Class, I get an “Could not run the ".....vsz" wizard." error. Many posts that I've Googled to suggest a “Repair” of Visual Studio. No problem with that I guess, except that I can't waste a day installing Visual Studio again.
Luckily I found the solution...
[via Willem]