Okay, I feel like this is a dumb question, but we really don't burn things much to CDs now. Really nothing besides pictures. So my question is... can you add to the CDs later after you burn stuff to them? Or is that only if they are RW? I can't remember...I want to backup some layouts (flattened) but they won't be enough to even fill half a CD, but I don't want to wait either. Hmmm