Indeed I use the hpt370, and getting it working took weeks. Mainly because I wanted the RAID, if you just want ata100 disks, you don't need drivers etc. The problem is installing on the drives which the installer cannot recognise as a raid array.Many problems, but the truth is out there!
You will need to flash the bios for RAID to work properly, details at pauls unofficial abit kt7a faq, which is somewhere on via's site, google will find it. There's probably something similar for your board.
Then you need a highpoint driver, from
www.highpoint-tech.com . Theres a RH version 1.3 which works with 7 - 7.2 . In the download tarball, theres a readme pdf which walks you through it.
I don't know what a vp6 is offhand, but if its an athlon, watch out for the athlon bug which is probably still headlining at slashdot.
At work at present, will try to check back later in case you need more help.
Jim