Well, theres no much to add to the title. With this CD you can boot and install a retail Snow Leopard 10.6 disk on your P5K-VM board. Also includes a post-install package with all the drivers you need, and a small guide (read it!). The package should give you full support for the onboard hardware (except for the onboard GMA- you need a supported PCI-e card), but Audio, Ethernet, SATA, ATA, Sleep, etc, should work without problems.
HP 6720s downloads
XxX Install Disc