The highpiont bios should be imbedded in the mobo bios.The HP bios version shold match the installed drivers.
View the readme that came with the present bios and check to be sure that the drivers match the current version.I can tell you that raid-0 does not like overclocking nor do the hard drives on the array(fsb
oc'ing).
All though I am not fimiliar with your mobo,I do know that when i had a kt7a raid(still do)that it ran much better without the via drivers.I found that M.S. drivers were more stable and performed just as well as the via's as they all seemed to have latency issues running ide and highpoint.