I found this thing that's called Vistamizer, it transforms your Window$ XP in Vista look. During the installation you can even choose to install some add-ons, like glass2K that makes the windows transparent and the best one that is Winflip: there is a button in Vista that when pressed let you see the opened windows in 3d, and you can choose the one you need, this liitle thing make the same but in a better way: when you draw a circle on the desktop it goes 3d   ... All these things are useless, will eat useful memory and your system will become a little slower (but I'm having a lot of fun   )

Obviously all are freewares :
 
Vistamizer

http://vistamizer.softonic.de/

it's all in german, but, hey, we have Andreas here   , and however you can choose the language during the installation

Winflip is here:

http://winflip.stylekings.de/

have fun