Modding a God

[MTCason]

I'm wanting to mod the Divine Emperor of Pythium, but am having the darndest time figuring out -how-. I've downloaded a few other 'god mods' to try and get some inkling, from the files, as to how, as the modding guide is no help whatsoever in this regard ... but no luck. I take it I need to know the 'selectmonster' # for the Pretender? Can anyone tell me how I would find this? I've scoured the boards, but haven't found any useful info, so any advice would be most appreciated!