Ok! Act quick! you might have a key file in your BL folder. (KEEP SERCHIN IF U DONT BOY!) In that case, burn your BL folders onto a CD/USB/whatever and put it into your new comp. Next, move those folders into your new harddrive, fish the key out, and get it in there!
If not, try all your e-mails you own on the key recovery to annoy Badspot like hell! Then wait for your official ban or reluctant e-mail verifying your key recovery! After that, hole up in your room, ignore your parents, and alienate all your friends who call you within the first month of gameplay!