step 1: have friend join core free for all pre-game lobby for 5 seconds.
step 2: have him hover over public match in the menu before the menu where you can create a class
step 3: back out to lan party, hover over create a game
step 4: press triangle
step 5: join your friend hovering over public match
step 6: after the joining in session disappears wait a few seconds and press X and O at the same time
step 7: repeat until in a lobby where you can invite friends, make sure your rank is shown (ONCE CREATED YOU CANNOT SPEAK)
step 8: invite 4-6 friends
step 9: once game starts, end it
step 10: set up lobby and enjoy

credit:

BRANTINA

If need help, add me on playstation (BRANTINA)