I edited some files from the zombie realism mod so you get 5000xp a kill or 1250xp a kill:

-First of all download one of the files 5kxp or 1250xp.
-Go to computer, local disk, users, (your acc), appdata, local, Activision,CodWaW, Mods, ( zombie_realism_v2 ) , And overwrite the existing file with my file have fun

-Feel free to request another amount of xp, press thanx if you like it

VirusScans
5k Xp
VirusTotal

jotti

1250xp:

VirusTotal

jotti