hmm - not that i have heard yet
there is a way by using:
setobjecttexture
but unfortunately it works only an a very few number
of vehicles (i know about the truck).
That must be also the technique, BIS is using in multiplayer
i asume.
However, what about checking for the driver/gunner/commander
of vehicles and if positive, attach 'em a flag with your
expected logo.
This would then look same like entering a vehicle during
a CTF, after you've captured the flag.
~S~ CD