Hey everyone, I just wanted to give a quick update. I managed to figure it out with some light lua work. I loaded this version of IGE into an MPMPM alone just fine, so I knew it wasn't this mod. When I tried it with the community patch mod however, it didn't load. That is because as a MPMP your mods are not seen in the game as mods, so any lines of code that look for other mods and try to process their lua hooks don't work as there is no such associated mod ID or something along those lines, as that mod never was technically initialized from the mods menu. The community patch mod includes an "Overrides" folder that has an "InGame.lua" file that does exactly that. The InGame.lua file that sits at the root of your modpack is instantly overwritten by the one that resides in CommunityPatch/overrides/InGame.lua. So I just went into that overrides InGame.lua and added the line...
ContextPtr:LoadNewContext("IGE_Loader")
... at the very bottom. This forces the game to look for another file named "IGE_Loader", which in our case is fulfilled by the lua file in the Mods section of our MPMP, which allows it to load successfully. I'm going to try to add on all my other mods now too and see how it goes.