I snagged an OEM copy of Vista x64 with my brand spankin' new hardware, but I'm keeping my existing Raptor 74gb hard drive. I plan on picking up a Raptor 150gb + 500gb storage drive later on (Raptor 74gb will get swapped into another box), so will I be able to reinstall OEM Vista x64 on my Raptor 150gb when the time comes? I ask, because I'm totally confused about the "system builder" disclaimer and the real-world constraints of the OS's EULA.