So, after all I managed to extract the files. I found something similar to the old descr_model_battle.txt in old rome, it is the data/unit_models/battle_models.modeldb. I tried to open it with Ms Excel, but I can't recognize the data I need. So, the original question was: how can I modify the distances for lods and sprites? Please, someone help me with this!
Thank you very much!
O, I forgot to mention: I have version 1.0 of Medieval II, and don't ask me to install patch 1.2 or else, because first I want to see what does the first version...