HELP! A sort of Newbie question!

I think my “descr_model_battle.txt” reached the limit. So I want to delete some models in the file, but when I delete an unused model the game CTD.

I would like to get rid of the models of the arcani, cheat oliphants, screeching women, druids, bersekers, amazons…

Probably I must delete something in other file!!!!

Can someone give me a clue…