well, a jumpdrive won't fix your computer, but it will ensure that you have a backup of stuff you want to keep, should you end up having to reinstall your OS again.

here's the one i have:
http://www.amazon.com/exec/obidos/tg/detail/-/B000117DF8/qid=1115140897/sr=8-1/ref=pd_csp_1/002-4718611-5996019?v=glance&s=electronics&n=507846

it's a bit expensive, but, to have a backup of everything important, i find it to be totally worth it.

anyway, take a look around for that disk and give me a call. if you can't find it, i'll see if i can dig something up. 617-372-0924