What mobo? What version of RAID chipset (i.e. ICHR05, or ICHR10)?
If it's Intel based, go to intel. If it's AMD based, go there.
I know of your frustration. Trying to find an older driver to set up RAID, then didn't have a floppy disk, I finally got it on a USB Flash drive, to install during Windows 7 set up. Luckily I have 2 computers.