Not only will they probably be packed differently with different encryptions.
Ever character has its own animations that respond to certain commands in the game. It's probably going to be very disfunctional.
If you do want to try anyway these are my recommended steps:
Find where the model is stored and packed. Find where the animations are stored and packed.
See if they use the same filetype (and maybe encryption?)
Replace all the necessary files (animation and 3d model)