OK, as promised here are 5 pics of my box so far. I still need to tidy up the wires and fuel tubing but it looks like it should word out fine.

The fuel 'cells' are from Walmart and were $4-5 each. They easily hold a full gallon of fuel each. I added a small vent out of brass tubing, as well as the line to draw fuel out. I did not put these in the cap, rather the top of the jug. this way i don't have to disturb any of the lines when refilling the cell. i used some silicon liquid nails to seal the flip top on the caps. These jugs didn't require any modification and fit nice and snug right down the bottom of the flight box with the battery in between them. there is some modification required to the lift out tray but I think I can still work in a couple compartments in it.

On the outside of the cart i have the power panel and fueling station. Nothing fancy on the panel, I just removed the back cover, soldered in the power line of my pump to the 12v location on the pump plug in location on the panel. put the cover back on. With the pump inside the flight box with the switch on it to 'on' all i have to do is hit the button on the power panel and it pumps.

For the fuel connections on the outside of the box, there are 4. Starting at the bottom, is the line from the pump to the plane. Above that is the other line from the pump that actually is the 'in' line to the pump. on this conection I go to either of the 2 connections above it, one to the 4-stroke fuel jug, or the other to the 2-stroke jug. essentially the fuel with come out of the jug, through this connection, back into the box to the pump, then from the pump back out of the box to the plane.

well, I babbled for long enough, here are some pictures. Thanks to all the guys on this thread for thier ideas and innovations! this is great stuff! thanks to bill and drdeath for your thoughts and tips via PM.