Virtual CD/DVD for Free!

I recently bought a 500GB hard-drive. One of my motivations was that I had started to lose a couple of DVD’s because of scratches and some of the movies I have I don’t want to have to replace, it just seems wasteful. So, I’ve ripped a number dvds into an ISO on my harddrive. Well, that’s great, only now I realize that I’ve got ISO’s that I want to turn into XVid or DivX formats [...]