Don't know if this helps but I explored bios not changing a thing
The bios version is 060.084.070.000.008.000 on a dell XPS M1730
As for RAID and SATA I found sata operations area and it has raid set to autodetect/ahci.
Don't know if this help dell don't k ow what is going on and there no help
That BIOS version tells me nothing other then the version number.
As for the RAID/SATA
if it's set to "autodetect/ahci" try this - when installing Vista and it asks if you need to install drivers by pressing F6, Press F6 and when then OS asks for the drivers on the floppy, pop in the floppy and follow the Vista's instructions, that should install the RAID or AHCI drivers. Once that's done, let windows do it's installation, and if the RAID/AHCI drivers were the problem, then Windows should complete the installation.
Be aware that you may have to install both the RAID and AHCI drivers as these are usually two different drivers. If you have both, install the AHCI drivers first, then the RAID drivers. I seriously doubt you'll need the RAID drivers as I doubt you're running RAID. But try installing both anyway. If you can't install the RAID drivers, don't worry about it. And If Windows balks about already having the AHCI drivers installed, tell it to use the ones from the floppy.
If you don't have the RAID/AHCI drivers, you'll need to find them and install them on a floppy, or USB if your system allows it. You'll also need to know which RAID/AHCI drivers to use. That's where your manual, or tech support comes in.
I can't say this will work, it may not; Vista will usually install without the manufacturer's AHCI drivers and it has its own generic set...but you never know.
Good luck