Has anyone out there tried modifying the Zenworks 10 PXE Boot image to add their own scripts?

I've tried some of the work from
Cool Solutions: Creating a Menu System using ZENworks 7 SP1
but as it seems to go, things change over versions and what worked in 7 doesn't work in 10.

Ideally, I'd love to perform a few changes to the imaging.s script to then pull down and run additional scripts.