Promise have released some new drivers and BIOSes! So here we go:

SuperTrakSX6000 BIOS Firmware Build 58 For SuperTrak SX6000 Adds 48-bit LBA support (for drives >137 GB). NOT FOR SUPERTRAK100 OR SUPERTRAK66 - Use only with SuperTrak SX6000. File size 416 KB Released: 10-22-2001

SuperTrakSX6000 Driver 1.10 Build 31 Driver For SuperTrak Series Controllers Self-extracting file, includes driver for Windows NT, Windows 2000, and Windows XP. File size 50 KB Released: 10-22-2001

SuperTrak100 Driver 1.10 Build 31 Driver For SuperTrak Series Controllers Self-extracting file, includes driver for Windows NT, Windows 2000, and Windows XP. File size 50 KB Released: 10-22-2001