Did you remember to enable it?
check the namecheck thingy and see if the namecheck matches folder name.
setWheelTire: RtruckTire datablock does not exist (or is not a tire)setWheelTire: RtruckTire datablock does not exist (or is not a tire)setWheelTire: RtruckTire datablock does not exist (or is not a tire)setWheelTire: RtruckTire datablock does not exist (or is not a tire)
My bet is on the collision mesh. What did you use for exporting? Did you set up a separate detail level for the collision mesh? If not, then you found the possible source of your crashes.