Ripping from bratz rock angelz

So I'm trying to rip from this game, and the files are from a gamecube game which is something ive never done before
I usually rip from ps2 or psp games.

The files for this game are all in 
.ddf
.elf
.bnr 
and .gcp 

Any idea which files most likely contain 3d models? and how do I extract them/what can I open them with?

Heres photos of the file directory

Image may be NSFW.
Clik here to view.
Image may be NSFW.
Clik here to view.