CHUD POSTER: THE MANITOU!

I'm curious, Nick, what you do about the evil studios?  I hear when artists do stuff like this and try to sell it they have to give a cut to the studios or else face evil lawyers and such.

I ask because my girlfriend (yes the one that dumped me after new years, then we got back together) is an artist who has done one poster for Eternal Sunshine of the Spotless Mind, which I shared in the Christmas thread and was liked by some, amongst others.  I considered helping her sell it, and encouraging her to do more (she's working on two Blues Brothers ideas) but I don't know how to go about producing, selling, and the legality. 

Also, the posters look very cool.  Why just 11x17 though?  A cost thing? 

Thanks.