Hello,
 
I installed Vista Inspirat 2 on my Windows XP SP2. I replaced the uxtheme.dll. I've actually just recently had to completely reinstall windows XP so I had to reinstall Inspirat 2 again obviously.
 
I'm attaching a picture of the problem I get right at the end of installing Inspirat 2.  
 
After I click ok and restart my pc everything seems fine. I have a bricopacks and a Vista Inspirat folder in the windows folder.  
 
http://img208.imageshack.us/i/58805601.jpg/