ShanzyVulcan

hi can someone pls help me... i have a legal bought and paid for version of far cry 4 and have installed it and played some of it. now i got the open world mod for it ,,, did the update to version 1.10 and for some reason in the mod the files are Patch_hd.dat and patch_hd.fat. but in my far cry folder they say patch.dat and patch.fat. i cannot work out how to get this mod to work. any help would be greatly appreciated... thanks in advance. i am a newbie at using mods....