If you start VPC 7 up with a DVD in your Mac's drive, it will pop up a message telling you that you can't play DVDs in VPC 7 and to use Apple's DVD player to play them. It does say that you'll be able to access additional (ie. DVD-ROM) content on the disk though. Don't know if CloneDVD will work, but I sort of doubt it. There are several apps for OS X that let you rip compress and burn DVDs. Handbrake and Roxio Popcorn both come to mind, although I believe there are others.