What can he do. The dishes, change a diaper, fold laundry, go to sleep at a decent time of night, wake up while it's still morning, be more patient with his daughters, give them a bath.
You're probably going to have a whole lot more luck getting him to do the non-"baby" stuff, than "go bathe/change poopy babies".
your "easy" targets, will probably be dishes and laundry.
My current status: june 2006. Wife ran out and filed D. Finalized Jan 11, 2010, after 12.5 years M. 3 wonderful sons caught in the middle