which vehicles dont work in vcmp?
Most vehicles are working. Rhino, RC Bandit and RC Goblin are the unstable ones iirc.
Voodo is crashy when using the car hydraulics. Can't be fixed in R2.
Rhino is not fully synced.
RC toys are crashing, but there are some script tricks to make it less crashy in R2. Check http://www.youtube.com/watch?v=ctNza_nkW28 (my) to see, that it's possible to fly with a Bandit, just after some script haxxes :).