PowerLogix G4/1400

OK . So I have just inherited for nix a PowerLogix G4/1400 CPU upgrade card which may or may not work. The person who gave it to me is not a Mac guy but inherited a lot of tech gear when he took a small company over - routers , some old PCs external HDs etc etc. Anyway he gave this card to me and I thought it would be a worthwhile update for my Sawtooth. Nothing else came with the card - CD , manual etc
I've done a bit of research and apparently I need to find the PowerLogix firmware update for this card.The correct procedure is ...

1. Upgrade the apple firmware of the motherboard (the boot rom) to 4.2.8 or higher.
2. Upgrade the firmware again with Powerlogix’s proprietary software.
3. Remove the old processor.
4. Install the new processor.
5. Boot.

Doe anyone have any info about this firmware update or anything else , where I might find it , info about the settings re bus multipliers etc ?

Any info greatly appreciated.
Cheers , Stewie.