Posted in suggestions box, x-posted here just in case anyone else was interested. Since some people have been asking for a retextured Elysian flag depending on religion, I've made two versions of the Elysian flag to replace the base model for the ELY tag.

Just unzip the files, rename your chosen one to ELY.tga and paste it into the gfx/flags directory of the third_odysseyvbte zip file file. Both are VERY simple retextures; the Hellenic flag replaces the Palaiologos cypher with Poseidon's trident, while the Orthodox flag replaces the cypher with a Greek cross.

http://www.filedropper.com/alternativeelysianflags

EDIT: choose only one, and have that be ELY.tga. If you want it to replace standard Elysia (i.e. Green, post-flight, start of game Elysia), rename it to NHS.tga I may make more if I have the time.