Get (free) XSLT intellisense in VS.NET
Intellisense on XSLT documents: Copy thisXSLT schema file into the folder C:\Program Files\Microsoft Visual Studio.NET 2003\Common7\Packages\schemas\xml.
Restart the IDE and you're done. Enjoy! 
Via
Daniel@ Weblogs @ ASP.NET. Thank you, Daniel for posting this.