1) (Friend) Have 1 player able to host and get you into a lobby without an e as normal

Note: Step 1 isn't you this is the person finding the lobby"

2) (You) Make sure you lag switch or upload and download) and make sure you're in a custom game hovering over yes to load custom game.

3) when your friends in the lobby join him but it should take a while as your lag switching or other methods to slow everything down...

4) as it's joining you must keep spamming to load custom game. And it should put you in the game with him.

5). The rest of your friends can join at this point and the original host can leave and rejoin and you should be the new host with the custom game loaded.

6) When the countdown reached "Game starting in 0 seconds" make sure all your friends back out and rejoin again quickly but make sure your still uploading and downloading until everyone joins back so the lobby doesn't merge!