thanks for the reply, but i'm not sure we are on the page, so i'll try to clarify what i would like to attempt to do.
I download a model called fcao and place it in my models folder. Now i want to this model for the ship classes F-CA and F-CA+ as designated in the shipslist, and only these two classes. I would like the standard fca model to continue as before with all the other ship classes that use it on the shiplist(F-CAR, F-CAI, F-CAD etc.) Is this feasible or am i just missing the jist of your msg?