Core 2 Duo is 64-bit
Did you know, Intel Core 2 Duo processors are 64-bit! I'm running Windows Vista x64 on one right now as I type this post. I mention this because I've spoken to a lot of people recently who don't seem to realize that. SBSCs, that means, unless I've seriously misunderstood something - you can run Cougar on a Core 2 Duo system.