I can install Daemon tools o CloneDVD, but it refuses to show that the drive exists in My Computer.
I'm using Windows Vista RC1 Build 5600.
And for your info my Physical CD/DVD drive is refusing to work. Although it is happy to tell me it's connected, it won't show it as a drive, and says the driver is not installed properly.
If I go to the Device manager and choose the properties box for either item, these are the messages I get: (right is Physical, left is Virtual)

CPU Intel C2D Extreme X6800 |
Motherboard ASUS P5W DH DELUXE |
Memory CORSAIR XMS2 4GB (4x1GB) |
Graphics Card eVga 7900GTX 512mb (x2) |
Hard Drive WD Caviar RE2 500GB (x2) |
Sound Card Ceative X-Fi Elite 7.1 |
Power Supply ENERMAX EGA850EWL 850w |
Case Custom (Modded Enlight) |
OS Linux FC 5/Vista RC1 |
Monitor NEC LCD Black 46" 8ms |