A friend of mine said that on his computer (XP Pro x64), 64 bit programs run great but that Windows emulates 32 bit programs horribly. He says that they run chunky and slow. I was wondering if its always like that or if it could be just his hardware. I have a 64 bit Pentium 4 but I'm running 32 bit XP Pro. Should I get the 64 bit version?