Well, I'm certainly not a graphics guy. I could handle the xml/python (not that it is likely that it would require any python) parts though.
Flames do get annoying. One think that bothers me is that that the burning sands get no production. I guess technically this is no different than deserts, but it seems like a bigger deal somehow. I think that burning sands and/or flames should have more production and maybe gold for AV (maybe only sacrifice the weak) civs. (That was the idea behind the Altar to Bhall improvement in my modmod, but the I found that they could be built on forests instead of just Flames. I couldn't figure out a way to fix that, so I'm leaving them out.)