Most of us try to simplify the Darfur conflict into something we can understand. I admit that my partial acceptance of beardedbruce's comments is over-simplistic because Darfur is a complicated region.
It must be admitted that Darfurian black Muslims are being entrapped and many are now in the same situation as the Black non-Muslim population. Rule from the north is being escalated to a point of totality. Money from Asia (China, Malaysia, India) is strengthening the Sudanese government, but the desire for control would be the driving force regardless of the outside finances.

The following article explains something of the history, make-up and complexities of the Darfur problem:
http://conconflicts.ssrc.org/hornofafrica/dewaal/
Contemporary Conflicts

Ouside of division of Sudan I see no resolution in sight and I doubt that effective support for division can be garnered.