Microsoft dropped support for the original Perc (sometimes called Perc II) and there are no specific drivers available. However I have seen users report success on these forums by using the Win2000 driver.
(AMI) PERC II, 2/SC, 2/DC, Driver, Win2000, v. 2.68, A03
Filename: W2k268A.exe (47 KB)
One thing to note: The Perc II has a limitation of 12Gb for the boot raid container. It is also recommended to install the latest Perc II firmware:
Perc II - Firmware, v. U84/C81, A02
File Name: PERCU84.exe