Gbhil added a user configuration update zip that you can flash to his rom as a afterthought for people that didn't want to run set cpu. It would not be hard to flash over the pancake rom. It just replaces the gumbo.sh file with an updated one.
HOW-TO Customizing the boot script for Gumbo ROM 1.5c - Android Central Forums
I am running these numbers
1536,2048,4096,10240,15320,23040 That is the aggressive setting but I tweaked the 4th number a little because HTC social networks was hanging up all seems fine now no FC or hang ups yet.