Before Starting Have Setting On Player Limit (4)
Step 1.Create Custom Game Settings To Your Likings.
Step 2.Save Game Mode.
Step 3.Have Friend In Custom Games Lobby Hovering Over Leave Lobby (Yes)
Step 4.You Hover Over Public Match Then Join Friend Game While Spamming (A)
Step 5.Have Friend leave When You Join As Fast As He Can.
Step 6.If Done Correct It Should Say Waiting For 1 or 5 Players Invite Friends Or Randoms.
Step 7.Should Start Game. If Friends Get Kicked.
Step 8.Tell Who Ever Got Kicked Tell Them To Go To Custom Games And Edit Settings To What The Games Settings Are In Your Game.
Step 9.Then Press(Y) And Find Your Name And Join Session In Progress(X)
Step 10.Once Done Leave Game And Join A Random Game Just To MAke Sure.