Custom content overload

Hi,
I recently decided to convert the cinimatic characters into playable characters, but the problem is that they are huge. I was wondering if there is a way to make a custom mpq (like a patch mpq) that is used by the map. I don't want to edit the game mpq I would like to make a new one, that way I wouldn't have to use the import manager and import each model. Also, I wouldn't have to worry about making my map size too large.

if you find out, let me know.