Worked for me on Gigabyte GA-8IPE775 (rev. 1.0) with a Pentium 4 HT 3.0 on FreeDOS 1.3.
Set the SATA port used to an IDE Master drive not Slave in the BIOS, HDDHACKR.EXE only showed the Masters not Slaves (did offer to flash my dvd-rom drive though!)