Yes i have both installed. My "Mods" folder work, when i dont add to many add-on into it. If i add to many add-on. OpenIV wont load my "Mods" folder.
I found something about some gameconfig, dont work with to many add-ons, and i tried 4 different gameconfig, still no luck.
Right now i have 40 add-on cars, but if i add 5 more, the "Mods" folder wont work.