Mine is also metal on top of rubber, and I too left the rubber in place. Most of it will be covered with carpet anyway, and a few sections I've already installed vynal floor tiles.... If you leave the rubber down, use a primer on the rubber before laying the tile, they stick real well to it!! (they sell the primer at Lowes)
You just might be a Redneck if...
...your motor home used to be a school bus!
...Your living room has a steering wheel!
...Your home has brake lights
1994 Jeep Grand Cherokee
1989 Thomas Diesel Pusher (Cat 3208/Freightliner)