Maybe you can HELP! me...

I want to you VSA to analyze a distributed system.
If I try to create a new projekt, I can't select a VSA projekt anywhere.
I found a lot of pages in the VS documentation like "What is Visual Studio Analyzer" but I still can't create a VSA projekt!

How can I install VSA?
Do I have to purchase VSA by its own or comes it with Visual Studio??

I am using VS 2003 but also using the complete VS 2005 Pro installation, I can't use VSA.

Am I to stupid??

Thanks for any answer!