Sorry for bumping this, but I managed to fix a critical issue with this mod, that being the one Trevor_1994 described. Under normal circumstances, the game will only trigger the epilogue if you have 100% hood completion.
In order to fix this, you need to:
1) Find mission_global.lua in your unpacked misc folder
2) Go to line 771, which is: "while (not is_mission_complete("wr09") or (get_hood_owned_percentage() < 1)) do"
3) Change "1" to however many hoods you have as a percentage. In my game, I have 30/36 hoods (each rival gang owns two hoods each), so I changed 1 to 0.83. It's actually 0.834, but I rounded down just to be on the safe side
4) Save changes, copy your new mission_global.lua to misc 2 (you may not need to do this, but I do it with all my modded files anyway) and then repack your misc and misc 2 files.
I've tested this myself, and it works! Hope this helps anyone else wanting to use this mod (or make something similar for their own game)!