I'm guessing you have a full size montero and not a montero sport right? Below is a link to a hitch and video of the install.
You will also need a trailer light setup. Not sure if Gen3's need a converter but I would assume so. If it has separate bulbs for brake and turn signals you will need a converter.

http://www.etrailer.com/Trailer-Hitch/Mitsubishi/Montero/2002/75116.html?vehicleid=20021893

Last edited by hochkis; 12/17/12 06:00 AM.