Download
a fresh copy of the Beta.Copy the citizen files from these directories from the clean beta to their corresponding directories in the version of the Beta you wish to modify:
Location (model): models/Humans/
Location (textures): materials/Models/Citizen and materials/Models/Humans/
No idea what the models are called. You should be able to use some jpg files to find them.
(Also, who did a 2002 model skin? Would be cool to see.)
Alternatively, if you want the 2004 skin (which I think is what you are getting at maybe) then you will need to either:1. Decompile the 2004 retail model and rig it somehow to the Beta model format - no idea how to do this, I'm no modeller. You will only need to do this if the model itself changed between the leak and retail - idk if it did or not.
2. If it didn't change (the mesh is the same) then you can probably just copy the retail citizen textures over and see if that works.