I am interested in hacking new maps and AI positions/behavior for Contra III: The Alien Wars for the SNES. But I am new to SNES hacking, and the complete absence of any information or hacks for the game (it is not even in the RHDN games list) is daunting. Is it because there is something very difficult about hacking the game? For such a popular franchise and a good game, it seems strange that there aren't any hacks or even many posts about it.

I am just trying to get some preliminary info before I dive into a rabbit hole lined with barbed wire.