How To Flash Hitachi GD-2500

Ive found the correct FW here
but i have no idea how to flash the drive, ive tried within windows and in DOS but i just cant do it, so if anybody can tell me how i’d appreciate it thanks.

Will you be using A012 or 0012?

What IDE location is the drive connected to?

What have you tried already?

Its ‘A012’ i’ll be flashing to and its set as the ‘secondary master’, ive tried flashing within winXP, win2k3 and DOS from a win98 boot disk, this is on my second system a Duron 1200, also is there a way to increase its DVD-R reading to the full 4x? only reads DVD-ROM discs at 4x, its not important more of an experiment tbh.