once you down load it you can create an account.
if your account is not varifide(sp) you can still play on multiplayer on privite,
create your own pack name or find one that one of your friends have made.
((but you'll need their password))
((or make your own and make a password easy to remeber and tell your friends, i have one it cool,but better with a pack))
you can only have 5 in a pack