hit boxes and how to move fast in a map: (OMG NEW THREAD!)

jesus I know it is not cs but there is a hit box and I want to know how big or small it is so I can put the force model to the same size as the hit box.

I also heard that the hit box does not fully move with the player model.

Example the player jumps up off the ground but the hit box stays near the ground or jumping on a jump pad on q3dm17 the hit box is behide the player model.

I don't know fully myself if this is a load of BS.

as for the map layouts I was hoping for a down view layouts of arenas in q3.
Example: http://www.beyondunreal.com/content/articles/89_1.php.

thanks