Hi,
I was not able to locate the PzrGren SMG grp; but if there is any unit like that, then I may try to do a wild guess for its existence:
1. Load an infantry unit in a carrier vehicle.
2. Set a reinforcement entry turn for the carrier(example turn #3).
3. Unload the infantry unit and set a new reinforcement entry point for the infantry unit (for example turn #6)
4. Load your infantry unit in the carrier and save the scenario.
5. On turn #4, hit and destroy that carrier vehicle.
I don't know what all the above will result, but it won't be something nice!!
cheers,
Pyros