To put the new interface on XP? Sorry but windowsblinds does a good job but it isnt like Aero. Not at all. Windowsblinds allows you to get transparency. But Glass (Aero) allows for blurry effects and the likes. Which can NOT be duplicated in XP with no amount of software. Sicne Vista uses PNG files for their GFX while XP uses BMP and JPEG. Neither of which can do the Glass.
Yes Vista is quite expensive. I aint aruging that. But it is far more secure with the UAC and the likes. I rather think Vista is nice. I wont shell out $330 or more for it. But i will buy a new system and get a copy of it with it.