unanswered Advanced Back Sprite Editing

[Blarghing]

I'm kind of new to the whole narc file thing, but I've been muddling through it. I have been able to change the Trainer's back sprite to Cheren, Juniper, etc, but I'm wondering if it is possible to replace the trainer's back sprite with a Pokemon's. Since the number of files within each archive don't match up with each other, I haven't had any luck yet. I guess my question is, can it be done? Has it already been done and I just can't find it yet? Another thing that's been bugging me is the texture hacking videos. I searched around but can't find any tutorials or programs to use for it. Sorry if either of these topics have already been brought up, I haven't been able to find anything on them. Thanks for any help or input.