basic halo 3 questions (easy to answer)?

[crazy calebino]

I just got Halo 3 and I have been wondering...
1. If you are in a custom game, how do you sign one account out. Every time I try to do this, I go to dashboard, but when I play again, it still shows the other player, even if the controller is off.
2. what are some good maps/game modes for 3 to 4 player local.
3.if you want to get awards/achievements for beating the career on different difficulty levels, do you need to beat the whole game, or just certain levels?
4. How do you take videos/screenshots?
5. any tips?

 

[I wash floors]

To sign a player in you have to press your guide button, then click sign in on your account that you want to play on. If your playing local u can sign in a normal profile, but if ur playing live u must have an xbox live profile. to remove a player you must sign out, not just turn off the controller, to sign out press guide button and then x. a good map for 3-4 player local would probably be guardian(thats my favourite). and the best mode would be slayer (killing). you get certain achievments for beating certain levels and certain achievments for beating it all, there are many achievments that u can get. to take a screenshot or video u have to go to theatre mode after your game. this is in the main menu below forge. i hope i helped u out ? if you have any mroe questions feel free to add me on live tomzz46