Another point to note. You can inject a falloff curve into a Zone. So if you have some particular shape that you use a lot, you can put it in a cm2 file in the camera folder and apply it to any Mag Zone. Here is an example of a completely flat curve with no falloff:

{
//ZONE-01.cm2
version
    {
    number 5
    }
actor $CURRENT
    {
    newFalloffCurve
    falloffCpt 0 1
    falloffCpt 1 1
    endFalloffCurve
    }
}

Note the use of "actor $CURRENT" (which only works in P5 or above), this means that it will be applied to the selected actor, whatever that actor is. You should be VERY CAREFUL to have a Zone selected when you apply this, if you apply it to something other than a Mag Zone it may have an undesirable effect, it might even wreck your scene.

The reason I suggest saving this as a cm2 to the camera folder, is because a pz2 can only be applied if there is a figure in the scene.