[Tutorial] How to rip PS2 models v.2

[TGE]

I'm having trouble texturing the meshes. There's a lot of different objects in every obj, and I can't even figure out how to texture one. Is there a video tutorial about texturing ripped meshes?

It's a matter of trial and error.
I usually assign the texture that is most likely used most to the whole model, and then apply the different textures seperately.
If you're lucky, each object uses a seperate texture and its even moar trial and error.
Conclusion: Trial and Error.

Alright, but how do you apply one texture to all of the meshes at once?

apply the different textures seperately.

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What I really want is to know how to scale the models without worrying about backface culling. Any help?

CTRL+A?
You can fix the backface culling by enabling the 2-sided tag in the material settings in Max. It's in the bitmap tab on the top right.