Same folder and everything?

Hi! I'm rather new to this whole Brawl hacking business. I'm following a tutorial for getting custom textures for characters, by creating the proper folders in an SD card, and using filenames like "FitMario00.pcs". Tehn just launching the game through GeckoOS to activate them. My question here is: If I want to use custom models instead of just textures, are there further steps that must be taken, or can I just use the same technique that I use for textures? Thank you!