Hey man,
Looks really good, I really need to up my texturing skills as there pretty poor at the moment!
I dont know anything about mudbox but is there not an option to switch the lower geo? Like morph targets in zbrush?
Ive re UV'd my base mesh (level 1) to take into consideration the changes ive made then reimported that into Zbrush, taken out the level 3 mesh into maya, taken the uv's out and textured from there.
"No pressure, no diamonds" Thomas Carlyle