Yeah, I don't know; Linux distributions bundle GPL software with non-GPL software. That doesn't make the non-GPL parts suddenly fall under GPL. In practice you'

Yeah, I don't know; Linux distributions bundle GPL software with non-GPL software. That doesn't make the non-GPL parts suddenly fall under GPL. In practice you're probably fine if you offer the GPL parts for free separately as well. Certainly, if the copyright holders of the original work openly state they don't consider third-party images and CSS to be included in the license, then I think they would have a hard time arguing the opposite in court.