Edit }- Try searching the forum this has been anwsered allot of times
http://forum.thegamecreators.com/?m=forum_view&t=20219&b=10
I don't know of any multiple "Screeds"
but anyway, if your talking about 'multiple screens' you can use the same camera. Just try it out yourself, no point just giving you the code :/ otherwise you'll never learn.
Try position / resizing the one camera then having it switching between places obviously sync'n / refreshing the screen to update the camera position.
BE WARNED using this way WILL slow the game down.
ALL COMMANDS REQUIRED CAN BE FOUND BY PRESS F11 WHILST IN DBC 
With of course a bit of general wit about yourself.