So I have downloaded a couple mods (item stacking and book of all knowledge). I made the Override folder inside the data folder and placed all files inside. When I get into the game I notice non of the mods seem to work items don't stack to 99 and no books are added to my inv. Any help will be wonderful if you need more info I'll be glad to provide.

Please, make sure you put the files into Data\Override folder directly, avoiding to create any subfolder there.