Thank you for your concern Quaade, but I have contacted GW about it.
I cannot use any of their artwork, nore can I "buy" the artwork from anyone, so it has to be donated,or made myself. I would draw better if I put a pen in my mouth and had a seizure, seriously, Im that bad.
So I can use artwork depicting GW material, so long as the artist, nor I, gain any money from it. So all my fundraiser money (as originally planned anyways) is going to the chairity. There, hopefully, shouldn't be any problems.
And I have a feeling it would be a dumb move by GW to try pull a lawsuit on a charity that is basically promoting their stuff for free.