Yes, there is such thing, I have it on my PC user mag DVD that transforms your computer into "Vista" though it can't easily be removed because of a bug. So it makes your thing look like vista, but its still different.
Is it hard to setup?
- Van
Try using this:
http://www.stardock.com/products/windowblinds/
Makes your PC look like vista without requiring massive amounts of RAM consumption or rendering your OS incompatible with everything. Been there, installed Vista, back to windows XP.