It depends on what the bottom bracket style is. If it is an older bottom bracket, it will have a metallic fixed cup on the chain side that will have a narrow (only about 3 mm wide) metallic surface that is flat on two sides and is 40mm around sticking out from the side of the bottom bracket; if this is a case, you can get a headset wrench from Park Tool (I use the HCW-9) that has a narrow 40mm fitting that will fit on the fixed cup off of the drive side and (just remember that the threads are reversed, so you will turn clockwise to loosen). Once you've gotten the crank and the ring off the other side, you can take the fixed ring off the drive side as described above and simply pull the bottom bracket through the drive side once it is off. The only downside of this is that the crank on this side will remain attached to the BB and you will have to buy a new crank (which you'll probably want to do anyway, since a crank with stripped threads is not something that you'll likely want to keep around).

If you have a more modern BB that doesn't have the metal surface for wrench flats on the drive side, all bets are off and you will have to try one of the other techniques mentioned above by other posters.

For a more detailed description of this process, see my post: http://www.bikeforums.net/showthread...kets?highlight=. In my case, none of the other techniques I tried for getting the crank off worked, so I had to figure out another way to get the thing off.