Ok, I know this was probably a stupid thing to do, but.... I bought a computer with vista installed (premium) and since I wanted to see what vista ultimate was like, i installed it on a separate drive. The premium is 32-bit and ultimate is 64-bit. My question is: how do I get rid of the 64-bit without having to use system restore, or mess with the original? I was also thinking about installing XP Pro as a dual boot, but i don't know if it will slow down my system too much (I don't have too much memeory). Thanks.