I don't think theres a way currently, all tools were made for 32bit operating systems.
The best and safest thing to do is to install windows xp pro sp2 (32bit). XP Pro sp2 will run on 64bit cpu's.
Stonersmurf is right! It's more to do with the fact that your running 64bit windows. To my knowledge Windows XP 64-bit edition does run 32bit code but only if it contains "pure" 32bit code. This is why many application fail to work...
Intel Core duo 2 has EMT-64, Intels name for 64-bit extension.