combine an ActionScript 2.0 code with a SWF that already has a AS code.

I`m trying to build a "Pan and Zoom Map" (see example of the swf here [login to view URL]) everything is working fine but the problem is i need to change the pivot point so when you zoom in and zoom out with the mouse wheel, the center of the image is where the user put the mouse cursor. (see example of a code that does this: [login to view URL]) So, what i need is to integrate both codes into one. I"ll provide both FLA sources files.