Well the artist must be OK with it since there have been Speical licenses provided to others, you can't say yes to one and no to others in my eyes just becasue a game or dev has been able to wow the makers eyes we should be offered the same options really, and there are a few non-RTP resources on this site also don#t really need to go to others but there add-on's none I know of that will replease the hole RTP tho I don't even use the battle images and so on as I telling a story with me
I know a lot and could do a lot but doing so would brake EULA's and I want to support a good tool but I want to also been made to feel I am a customer that is wanted not a customer that gets the tool and then shuts up