error during install haven t seen this posed any else

I am trying to install 32bit vista on an nforce3 sata raid 0 pair of drives. Windows XP currently resides on this "drive" and I put the vista beta 2 dvd in, and go through the steps. I have tried loading the beta drivers from nvidia (though it says they are for nforce4 + only) and tried loading the drivers that came with the MB (read somewhere that works too). When that is done I click next, and I get an error message as follows: "An error occurred while searching the system for unsupported devices". The installation quits, and Im back in XP. I have installed (and uninstalled) 64bit on a single sata drive, since I couldn't get the raid working, and vista ran fine. I would prefer the 32bit version, however, and also would like to have it running on my striped raid. Any suggestions?