How can i use Vista x64 and Windows 7 side to side? -

I m just an enthusiast, and i like this stuff... i want to know what i need to get Windows 7 (beta) to work with my current set-up, Vista Ultimate x64... (i dont know whether to post my computer stats or not..)...kind of like on the Leopard OS, and VMWare or BootCamp... along those lines, where i can just install it if i need to... What exactly do i need to accomplish this, even if i have to buy some software??

Dual boot. Look it up on a google search, will tell you all you need to know.