Look here for assistance in modding Medieval II: Total War.
Here you will find essential links and info on modding MTW2 and it's expansions. Including; Config File How To's, Mod Switch for Dummies, and info on patches.
Modification Resources - Collection of Walkthroughs, Tutorials, Modding tools and open source modules, skins, scripts, etc. for both beginning and advanced Modders.
Ask questions about skinning, modelling, and animations for units, editing building models, and all 2d graphical editing.
Ask questions about all text editing and scripting aspects of modding.
Ask questions on all aspects of mapping, how to create add cities and resources, which files need editing and graphical edits.
Ask questions on sound & other media here, from music, voices to fx to in game movies, ect.
If you have questions which do not fall into the other categories, or which cross categories, post them here.