1. Install the latest 1-12-1 VP as normal.
2. Download this:
https://mega.nz/#!vEtnAKpI!uTQgWRkIZQW1-PtYDXlCGFcInbv1u0XRVbalynD9bQk
3. Delete the DLL in (1) Community Patch
4. Open (1b) 43 Civx CP
5. Based on your choice of install, delete the other two folders from this mod (CP Only, EUI, or No-EUI).
5a. For example, if using the full VP with EUI, delete the CP only and No-EUI folders from (1b).
6. Take note of the XML and LUA files remaining in the (1b) folder. Navigate to the LUA folder of the version of the mod you are running and copy/paste those LUA/XML files from (1b) into that folder, overwriting as necessary. Do not delete the lua/xml files from (1b), as they aren't all duplicated!
6a. Example: If Just using (1) Community Patch, Open (1) Community Patch/LUA and copy/paste all xml/lua files from (1b) 43 Civs CP/CP Only into this folder.
7. Enable (1b) along with all other applicable mods.
8. If you did it all successfully, you will be able to increase the number of major civilizations in the game setup menu to 43.