Actually, if you make a copy, as long as you don\'t format your computer, you will still have the Key from that game, and you don\'t need to reinstall starcraft. Easiest way, for now. I know blizzard doesn\'t make it easy to find their keys in the registry, and I doubt very much they\'ll tell you where it is for security reasons, so other than that you\'re pretty much outta luck.
Here\'s what I\'ll do though. I had a friend who bought a copy of starcraft and other than the original key, it had 5 more pasted onto it (for some reason) on the outside, all of which worked on BNET, I\'ll see if he still has a free extra one (though he was giving them away before)...