Just drive on some really hard trails off-road. Rocks take them off pretty easily. <img border="0" alt="[Hillbilly]" title="" src="graemlins/notooth.gif" /> But they've never totally fallen off (yet) so I haven't seen the whole story to how they're attached. But it's mostly several clips in holes. I've seen at least 2 types of clips on these things. AFAIK, the obvious ones on the rear doors should pull straight out. I can't get some of the clips to stay clipped again, though. You might need to get a little creative when adding them to a door that didn't have the holes previously. I know JadeRunner added a sheet metal screw or two to the flares on the doors so it's not loose.
<img src="http://www.trailseeker.com/4x4/moabzuVI/Pritchett/marmot/images/marmot%20123.jpg" alt=" - " />