once you watch the film go to team tactical and get in a lobby and once spawned kill yourself. (NOTICE)- If the host has not watched the film this will not work!!!!

Wait for the host to back out then when your host you leave. you can tell if your host when the host migration is over just hit the (back) button and whoever is on the 4 bar is the host.

When you leave the game and your on the multiplayer menu go to playercard-edit playercard-then buy a new title and some emblem slots. Also go to create a class and buy a random gun.

Once you have done that sign out then sign back in.

After that prestige and play an actual non hacked gamemode such as Dom,TDM,Etc.

Then get back into the team tac lobby and repeat the steps.

If you get to your desired prestige then keep killing yourself untill you need(0)xp to prestige.
Sorry if this is hard to understand this is my way of doing it.

(note) I also check callofduty(.)com to make sure it sticks.

Hope this helps!!!!