Help to edit old Civ Bonus Mod

Hello, the mod I am referring to is at this link

It no longer works because Lords of the West DLC and further updates were released and the original author apparently does not maintain the mod. My question is…

How do I go about updating the mod for the new civs Burgundians and Sicilians? Do I use the genie editor? When published, i have no intention to take credit for the creation of the mod, I just want it updated, I believe I can do it on my own, just need to be pointed in the right direction and I’ll take it from there. Thanks for any help!!