You may be interested in my MedManager utility, which makes it easy to
manage some of the features of Medieval II Total War. The first version
supports managing mods:

o Create a new mod in its own directory, without changing any of the original
M2TW files, or without creating a complete copy of the M2TW installation.

o Automatically create desktop icons (shortcuts) for your mods.

o Define which files in the original M2TW installation to include in any new
mod.

o All presented in a easy to use Explorer-like interface.