Download the files house posted: https://www.mpgh.net/forum/245-call-d...-5-11-a-4.html
And place them wherever they should be placed
Then go to your call of duty black ops folder
Then players folder
Then open config.cfg
Then go to the bottom and paste this:
Then make the config.cfg "Read only" by right click -> propertiesCode:bind F4 "map zombie_cosmodrome"
Now start you game and press F4, then the map should load