Well, I came upon the exact reason why I'm so scared to clear out my runtime. Was doing an image this weekend, needed desk. Thought to myself that it'd be a perfect time to use one of the desks I bought WAAAAY back in 2000. Took out the CD and it wouldn't read. Not really scratched or anything. perhaps a bad disk. Doesn't matter. My desk was not accesssible. I'm scared to backup and delete. I do it sometimes to be practical, but get a queasy feeling each time I do it.