I have Mac G4, MDD, with recently installed super drive. I never had a problem burning CD-Rs. Lately, I burned a CD-RW with some Word Perfect documents. I made minor changes on the original document on my desktop and wanted to put the new version on the CD-RW. I opened the CD-RW icon and tried to trash the first document. The prompt said something like: Sorry, can't do. Error code 61. The CD-RW cannot be modified. On the internet I found only ways to do this with Windows, but nothing for a Mac. I'd rather re-burn CD-RWs than throw away the CD-Rs after every minor change. What an I doing wrong?