I recently bought a 2000 4Runner. The seller did not have the keyless remotes. Apparently there are two possible systems. A factory one and one for the VIP systems. The VIP system is installed, however when I run the program test for the factory system it indicates that it is still present. I would like to have the convenience of rolling down the back window that the factory remotes have. The VIP remotes do not have this option. Does anyone know if I would be able to program a factory remote? or do the dealers disable the factory system when they install the VIP upgrade?