Adding to Dogmeat's suggestion; Is there any chance of adding a function where if an infection/zombification action occurs on a unit who's model was not accounted for by the addon, a substitute model is selected at random from a number of already existing models. This way if a group of custom units are infected, they don't all become the same model.
IMO having custom units become random civi or military zombies/infected is a better option than just changing them to a generic unidentifiable model; a better result for only a tiny bit more coding (a random function :P ).
Great work with this addon, though, I'm loving it!
It even pushed one of my friends over the edge in his decision to purchase ARMA II! Heh.
Make that two friends, now!