Replace your back bumper with one of these. web page <img src="/forums/images/graemlins/kewl.gif" alt="" /> I think its better to have the thing hanging off the back then adding wieght to the top of your vehicle.

If you dont want to pay for a custom rear bumper there is probably a way to just mount the carrier to your frame. <img src="/forums/images/graemlins/cheers.gif" alt="" />

96 Montero LS 24V DOHC 3.0L.
98 Montero 24v SOHC 3.5L, factory rear locker, Winter/tow package.
63 Jaguar XKE 3.8L FHC
2000 Mercedes-Benz e430
07 fj cruiser