Thanks mate, here is a quick run down of what I did...
I took out all the flooring, wheel ect, ripped out the screw point for the wheel and welded it over.
Built a frame around the top of the wheel well so I could screw a level board onto it and sealed it. (Make sure it will be high enough for the woofer to clear bottom)
Painted the wheel well in sound deadening tar and once dry, applied 5 layers or fibreglass and resin (to strengthen the enclosure)
Made a wall to cover the rear seat, mount the amps to and to hide the wiring and shaped it to the boot lining (making note of the swinging boot arms)
With both the amp board the the floor boards in place (to be accurate), I the began creating the jigsaw puzzle of mapping the line of the boot floor. I then traced the lines onto a piece of cardboard and test fitted and adjusted further (this is a VERY long process if you want it to be spot on).
Once I was happy with the fake floor, I used 2 thin pieces of MDF (around 6mm). You will not get it in, in once piece so the best option is to get 2 pieces, butt the straight edges together and trace around the cardboard template with the join in the middle.
With all the pieces in place, I confirmed everything was flush and cut the hole for the sub.
The amp board was carpeted out of the car and holes for the wired drilled. Once that was in place with the wires poking through, I glued an screwed the floor board to the frame. I then squeezed the final floor panels into place onto some more glue and carpeted the floor.
I then mounted and wired up the amps, poked the overlap of carpet on the floor down the edge and mounted the sub.
Doesn't sound too complex but I have left a lot of specifics out and getting things to fit right is a lot harder than it seems. I did this over a couple of months so I didn't get complacent and it paid off!
I will add some pics tonight when I get home. Here is one uncarpeted.
Hope that helps people! If done right the end result is well worth it!
Todd
EDIT: HERE IS THE PIC OF MY WHEEL WELL SOUND DEADEND AND FIBERGLASSED...