RPG game: Background image that moves with key movement

Hello,

Please have a look at this first.
http://www.actionscript.org/forums/showthread.php3?t=269639
And download rocskyline’s RPG_GAME.zip.

My question is: how do I incorporate a background image into it. If I put the image into the same mc as the wall then nothing happen (I’m assuming it’s because the hit test is hitting everything). But if I put it into the same mc as the wall BUT only talk to the wall then only the wall moves…obviously.

How do I talk to both of them but only set the hit test to the walls and let the character be able to “walk on top of the background img”

Or should I talk to the stage. Or put the image onto the main timeline and tell it to follow the movement of the wall mc? How would one do that.

Thanks for your time