when i had my american audio dv2 mixer and used it in MIDI mode, i used something called crossmap
http://danlin.de/projekte/crossmap/ and it was VERY EASY to figure out. daniel lindenfelser aka DJ lilin made this for people who wanted to create their own MIDI map outside of Cross for various reasons. the LEDS ETC were very easy to assign, knobs etc were easy to assign and it only took me a week or so to figure everything out...if u need help i will be more than glad to help u out.

its actually worth trying