I guess we are all on the hunt for ya !
No luck finding documentation, but here's a good link
to overclocking based on the PLL chip on your board:
How to: Overclock Dell, Gateway, Compaq and other branded computers - Guru3D.com Forums
edit: Still hunting.
Best search results I've had in Google were
with the words "Maximizer GFD settings":
Maximizer GFD settings - Google Search