You will have to reinstall the game anyway. Why? Because you formated your drive 3-4 times. Which means, your registry is now on the big RAID-array in heaven. And without a proper, never looked-at registry, you'll get the "all my units blow up after X seconds!"-bug. No way around it. So, to make it short: Even if you get the game running, you will have to reinstall it.
Ergo it's no use trying to get it work if you didn't reinstall it
after you reinstalled XP the last time.
P.S.: XP sucks. Get a real OS.
EDIT: Thou shalt not turn on n00by-flame-mode late at night :dead: