If I create a conversion document using BRP for Eclipse Phase and share it for free, would I be ok to use artwork from the PDF to make character sheets, reference sheets, player handouts, and the like using BRP? Also, I want to forward my time-line to create some elements I want in the game like anti-gravity, colonies, and FTL travel/communications. If I use the current stuff as history, add in my future time-line, new events, new technologies, etc. can I publish a system-free supplement under creative commons for free? Let's say I have a modified Eclipse Phase setting released under Creative Commons, can I then share a BRP system document for the updated setting material (again for free)? I appreciate your time!