This has been a highly requested tutorial, keep in mind this is only for the creation of add-on mods, these do not change direct game files, they are simply dragged to the 'dlcpacks' folder of the server on your Rage-MP directory, mostly for re-texture mods.
Tools required:
OpenIV, download here;
ArchiveFix, download here;
Base add-on files, down here;
The mod itself, I used this one as a test example: Mod.
I recommend creating a new folder wher