Either use a power bleeder and bleed them from the "nipple" of each caliper or have another person pump/hold the brakes will you bleed it form the "nipple".
You can easily make something similar to this. All it does is push air throught your lines to push out the fluid. Im sure if you have a air pump seal the top of the brake fluid resivoir with duct tape poke a hole where the air pump goes and start pumping. Ofcoarse thats real ghetto but it works.