i honestly had no problems, got basic core files that i like on with no hassle. drivers all fine apart from Dual Core Optimizer. i'm still running 32 bit at the moment because i've had a lot of work to do so i just want my trust old pc. i'll start installing all my programs and games for it when i have enough time to do so.
thats the advantage of dual booting when 1st installing 64 bit... you can never be sure about whether its actually going to be worth it. i havent seen a dramatic performance boost but i'm sure it actually is faster (loading startup programs etc. has been cut down a lot)
its nice to have a emptier windows so i can know it will be reliable
one problem though, when i have to select what OS to boot from, there are 2 lines and there is no difference between them, they both say Microsoft Windows Vista. anyone know how i can change the names to say 32 and 64 bit or something?