Do not jack just one side of the car. That's a bad idea. Do the front or the rear (or both).
I think there are 6 jack point on the car. Two near the right rocker panel and two near the left rocker panel (it's a small rectangular plastic box). As mentioned above, the rear jack point is the differential and the front jack point is somewhere under the engine.
http://www.m3post.com/forums/showthread.php?t=296726