You can host it yourself funny enough to say. Go on Black Ops 1, go to Theatre, then check on the right hand side of the screen it should say "ALL different sorts and types on mods where you can infect yourself". Look for an infection called "XP Motor host mod" It's under the time of 3:52 seconds. Click of that infect place it into your theatre the save it. Start the match then wait intill the game it over 3:52 seconds. On the 3:40 it should say "You have now been infected with these mods". End the match, rate the stars out of (5) then go online what intill your host. When your host and everyone gets level 55 back out and sign out then sign back in. Prestige again repeat it intill 15 prestige.

I hope I have helped you.