The MM90's (and many other P90's as well) react differently with gain than 'regular' pickups. Experiment with knobs/settings on your amps/pedals and the guitar... that thing -will- rock!
The big plus about that is you can comfortably play it without worrying about those pesky scratches...
"scars are like tattoos, but with better stories..."
if you haven't already, you might want to check this out - http://forums.ernieball.com/ernie-ball-music-man-guitars/64163-albert-lee-photos.html
...you'll get it now...
I liked the painted headstock. Do you just prefer a non painted headstock?
you can try is to replace the humbuckers in your PDN with Phat Cats. That's easy and reversible