-Spawn yourself as leader of a squad.
-Spawn another unit
-Spawn a blufor HEMTT
-attach the other unit to the HEMTT with the attachTo command.
-Unfortunately, I lost the coordinates for the attachTo command; I will kindly ask that you get roughly the same coordinates as I did, as the problem was very noticeable there.
-Preview
-Hop on to the back part of the truck. Keep switching between first person and third person. See how not only the soldier you attached looks misplaced, but also there is no trunk door?