Gravity Bleeding usually works unless you have air in the master cylinder.
Center the combination valve then bleed from the longest circuit to the shortest (LR, RR, RF, LF).
I built a pressure bleeder with an ACE Hardware insecticide sprayer and pressure gauge. Even if you buy the cap from Motive Power you can build it for less than $50. Once you've used a pressure bleeder you'll never want to do it any other way.
Here's the Motive Power 1105 cap. It's not rocket science to make your own but it may be worth $36 to just buy the cap.
Here are several DIY howto articles on the bleeder.
http://www.bmw-m.net/TechProc/bleeder.htm
http://www.yotatech.com/f106/30-00-d...leeder-211977/
http://faculty.ccp.edu/faculty/dreed...eder/index.htm