So I have this CD with really important stuff on it... it is a CDR, not a CDRW. I have some important files in the first session, and I didn't close the disc because I wanted to burn a second session with additional files. And that's exactly what I did, thinking that both sessions would mount afterwards. But they don't, only the second one appears. Toast (that's what I used) shows both sessions under "CD info", but I am not able to mount the first one! I tried Disc Utility, different CD-Drives, even BurnX Free and SessionBurner... the data is there, but how can I get it 