How to reset RB/411

I cant find any information about how to reset RB/411 to factory defaults.
We have some boards with passwords set and dont know which ones are set.
Thanks a lot.

you can either reinstall them with the netinstall program, or use the onboard jumper to reset. there is a small metallic hole, if you put a metal object in it while it boots - config will be reset.

Its exactly to the right of the trash icon:
http://www.routerboard.com/img/rb411.png