4chong doesn't like external links so i'm putting them here instead
This thread basically covers the ripping of the models which basically involves you getting it out of the game apk. itself or something like that:
http://forum.xentax.com/viewtopic.php?f=16&t=15582&start=30

This one covers combining the models but its in thai, you probably can get the gist of it from the video though:
https://www.youtube.com/watch?v=NsPASD1V9ao