I know there are thousands of ways to skin a cat.
Here's my idea for the following trap-out which I will probably begin tomorrow (Mon, 6-17-13)
Please feel free - everyone - to chime-in with your ideas as well, by the way.
I plan on using black trash bags and duct-tape them around the sides underneath the unit.
I then plan on using self-tappers through the top of the wooden base of my trap-cone into the a/c unit. (The a/c unit is no longer functional)
I will then shore-up the area underneath the unit and and beside the trap-cone with more black trash bags/duct tape.
Here's my plan using Microsoft Paint: