Why do you think it will run faster? Yes, 64-bits is twice as large as 32-bits, but not twice as fast.

64-bit Windows machines support 3dGameStudio now (as they do most 32-bit applications). But even if we rewrote the code to be 100% 64-bit, you wouldn't notice any improvement in speed UNLESS your game is using more than 4GB of memory (not likely unless you are doing something really weird).

In short: 64-bit is the future, it has a lot of advantages, but it isn't as amazing as most people think and it doesn't appear to be replacing 32-bit very fast.