Walk Around script

Where can i find a walk around script for 2.57b? I have a lookaround script where i can
fly around and view my game scene. I want to view my scene from ground level and have
the camera not able to go through objects and also be able to walk up and down hills. Just a clean view from the camera(no character, same as lookaround script).

Thanks for any help?

Use a box as “character” and put it on invissible. Might help.