I noticed that the models used on the campaign map are .CAS files, and so, ive decided to submit this file made by Vercengetorix that allows you to import and export .CAS files to and from 3ds Max. The models that are in cas format are in the folder:
C:\Program Files\SEGA\Medieval II Total War\data\models_strat
There are endless possibilities.
Requirements:
3ds Max
How to use:
1-a. Put this somewhere in your 3dsmax folder.
1-b. OR, Unzip this to
C:\Program Files\Autodesk\3ds Max 9\Scripts\
NOTE: Only if you have 3dsMax 9
2. To start this, open max, and go to the little hammer icon.
3. Click "Max Scripts"
4. Select the exporter/importer script.