I had an older Dell Dimension 521, I think C521, the skinny tower, where the motherboard has fried. I need to get my wifes files and photos into her laptop. It doesn't make sense to replace this motherboard. Will these Dell HD's fit into any of my older non Dell towers? Could I put this HD into a cheap Dell computer off craigslist and then I still have a desktop? Or should I just invest $30 into one of those cables that connect to the HD, is it an IDE cable? Is there a specific type/make of cable that would work best? And if I buy a Dell to put the HD in, how do I know which ones will work?