I recently uninstalled the January CTP of WinFX and then installed the February CTP (see instructions here).  I have been moving right along with no problems until late last week when I tried to “Add Web Reference...”  When I did, I received this peculiar dialog that said “Some of the files required for Web references are not installed.”

Apparently, somewhere in the uninstall/reinstall process the wsdl.xsl file in C:\Program Files\Microsoft Visual Studio 8\Common7\Packages\1033 disappeared.  The solution, for now, is to get a copy of wsdl.xsl and put it in the directory.  For me that was easy because I have multiple machines with Visual Studio 2005 installed.  I suspect many of you don’t have that option so I asked if it was ok to post the file.  I have attached the file to this post.