One of the only reasons to even consider going to Vista 64 right now is for the security features. If you're going to disabled the security features, why not just use Vista 32, and avoid the hassle? Would you buy a Porsche and ask them to lower the horsepower?
Not that it's what the OP did, but there are a lot of people who seem to be upgrading/wanting to upgrade to 64-bit because the number is double that of 32-bit, and therefore must be better. I fall into the camp of, "if you don't know why you need it, you don't need it."
B3C4U53 1 N33d T0 1N574LL MY 1337 PR099135!!That's the point I was trying to make. What's the point of going with a version designed for more security, if you're going to disable those extra features?