Well i too also couldn't get wireless working, in vista 32 and 64bit, and then my dad told me of a solution he managed to find from google!
anyways
at a dos prompt type this
'bcdedit /set nointegritychecks ON'
that disables it requring signed drivers, now these drivers i have were signed as far as i knew, they install fine, and nothing pops up about driving signing, however they didn't work, it installed fine but wouldn't detect my router.
after that you will have to restart, then install your wirless adapater, check to see if you can connect, if not (which is what happened with me) simply uninstall the device using device manager, then click scan for new hardware devices, it should then find the device, install the driver itself, and then work.
I don't think i've missed anything out, but i was going mad as i couldn't get it working, but now it works fine, and i have to say it made me really like vista
after that you can turn on the command you disabled by typing 'bcdedit /set nointegritychecks OFF' at the command prompt, and the wireless card should still work
hope it helps someone!