Thanks again for the quick responses ...I resolved the CTD problem ...I didn't know that I'd need to delete the two files data\descr_geography_new.txt and data\descr_geography_new.db after the unpacking process

...now I have another problem...
I modded the vanilla Venetian heavy Infantry, deleting all the existing helmets and adding the new barbute. But ingame all the modification are not present: I still have the vanilla unit with the original helmets (which I deleted) and without my new barbute ... is it possible that the game engine still reads the meshes stored in the packs and not the unpacked, modded meshes? ...suggestions?

Thanks in advance.