Vista Cannot find hard drive

I am trying to install Vista Ultimate on my current XP Pro machine. I plan
on doing a clean install. As I proceed through the installation process I
get to the section where I select a hard drive to install Vista too from the
list found. However nothing is found. The motherboard is an Iwill P4-HT
that contains onboard Promise Technologies RAID, I dont use the raid but use
for the extra IDE ports and the increased ATA 133 speed. I tried browsing
for device drivers which I found on Promise's website but even after the
drivers are installed it still does not find the hard drives sitting on the
Promise Raid IDE ports.

What can I do? I was going to try to put the Primary HD on the main IDE
(non -promise IDE port) to see if Vista would recognize it, still install the
needed Promise drivers, install vista, and once installation is complete try
to put the HD back on the Promise ATA 133 IDE ports in hopes it would
recognize it. But I wanted to check to see if that is a viable solution
before proceeding.

Thanks.