moving ground vehicle from one fs to another

I downloaded MMC4WD.zip file and installed it in fs98 with no problem. It can also be installed in fs2002 but I am having a problem with fs2002 recognizing the vehicle. This is a ground vehicle that works great in fs98. I have info on how to move aircraft from one fs to another but it has not helped me in this case. Can any airfraft be moved to another fs? Any suggestions would be helpfull. Thanks. Stash