How can I modify trainer battle sprites in Platinum?

I'm fairly new to this stuff, so far i've only figured out how to modify trainer battle sprites and mugshots for hgss using tinke, but it seems the layout for platinum is different than for hgss and i cant figure out how to go about it. I Figured out the mugshots, but i cant seem to figure out the battle sprites, or even find where they are located within the rom itself.

:o I found the battle sprites for Platinum in /poketool/trgra/trfgra
Don't know how to change them though.

Thanks, man. I think I should be good in terms of switching them out, it should be similar to hgss. In case you're curious, you just select the appropriate palate and graphic then export it, edit it, and import the edited graphic back in, making sure to keep under 16 colours. Kazowar made a pretty good tutorial on youtube i can link you to if you're curious.