Or why not just a bootable CD?
With a decent amount of RAM, you don't even need a harddrive except to store savegames and preferences, and a USB stick covers that too...
Either a cheap 64meg one for savegames, or a big 2gig one and have the game come on the bootable USB drive.
Its an easily portable game and a security dongle all in one.
The downside is no alt-tabbing out to chat while you play.
I have been thinking about buying a 1.0 gig USB jump drive. I am just afraid I might loose it.
__________________
Creator of the Star Trek Mod - AST Mod - 78 Ship Sets - Conquest Mod - Atrocities Star Wars Mod - Galaxy Reborn Mod - and Subterfuge Mod.