I have several CD-RW's with xiso's burned to them. What I want to do is erase the CD's for later use. Now, the problem is when I stick the CD-RW into the CD Tray it doesn't recognize the xiso and it comes up as blank. Therefore, there's no option to erase it. If I want to use the CD-RW for later, can I just stick it in and burn "over it", sort of speak, with Nero (since it's recognized as blank). Or do I need to erase it. If I do how can I erase it? Thanks.