I only have one harddrive on my computer and it's used for work and play. I backup everything on CD's. Since I've had a couple fail, I back up twice. One back up is the fully extracted folder and organized by runtime or by model type. I list on the front what is on each CD. What I've found is that zips and exe files can get corrupted. Having a fully extacted version is less problematic. I have close to 75CD's with nothing but Poser stuff and an equal number with Vue and Bryce stuff :) The CD's most prone to fail are the CDRW (read/write) version. I quit using them and now only use CDR's. I keep each of them in their own case. Knowing what is on each CD will make it easier to track down if the CD fails. It's a lot of work to do it this way, but someday may save me a lot of grief. I hope you are able to get your data back. Nothing worse in the world than losing data that you don't have backed up.