-download the .rar archive.
-delete any previous version of the mod.
-unpack the files into crusader kings 2\mod
-tick the mod(s) on the ckii launcher
-if you experience any runtime error problems, download cff explorer. make a backup of ck2.exe (location of file can vary depending on where the game was bought - for steam it is in C:\program files (x86)\steam\steamapps\common\crusader kings ii). open ck2.exe with cff explorer (right click on it and it shows up), click on "file header", click on characteristics where it says "click here" and tick the option "app can handle >2gb addresset". click ok. save the file. do the same with the ck2 launcher. play the game
-mongol portraits dlc is required to run the portraits part of the mod