Play as Javier Escuella

Javier's skeleton isn't made to be similar to John's, so if the model distorts or looks weird during cutscenes, you'll know why.

You'll need MagicRDR. Open the program, open your game's directory, and go to Red Dead Redemption/Game/Fragments.rpf. Open that up, and replace the files. The quickest way to do this is to right click and import directory, the open the folder with the Javier files. Make sure you save.