popUpMenu mel notes: "dagObjectHit" "link" Lots of in-depth notes, links and A template for creating an object aware menu "WITHOUT" hacking maya's internal mel files.
I just manually went in to the .mel files for the ContextMarkingMenu stuff and edited it all around to match what I preferred. The main thing about Maya (which I think they've actually fixed as of Maya 2012) was that generic stuff like the Split Polygon tool actually moved to different locations in the marking menu…