I need some freaking help! Editing a rom (Sprites, script, etc)

[oshawottiscute]

So all I want to do is just to edit a Pokemon Platinum Rom. I want to change which Pokemon appear in the wild. I want to change what NPCs say. I want to replace overworld and trainer sprites with those from BW2 like these: http://3.bp.blogspot.com/-j4CH5d6IwPk/T-hp4lLiy-I/AAAAAAAABOE/uDx4TrQaoCM/s1600/pokebeach-trainer-montage.png. I have downloaded lots of tools such as Nitro Explorer, PPRE, PKSV, and a few others. A lot of them ask for a .narc file, and I know that I need to use the Nitro Explorer to find it, but I don't know where the ones I need would be. I know how to edit the script, but I don't know the right format, like all the /n and /r and other stuff. So can someone please explain in detail to me what else I'll need and how exactly to do what I want to do?

[Reckutx]

I AM NOT ALONE!!! Sorry that I can't help, but I'm just so happy to know that I'm not the only one who is lost trying to find the hero/heroine sprites!

[Delta Blast Burn]

If you haven't already I would check here http://projectpokemon.org/rawdb/platinum/.