LiL BenNy

im building a false floor with like a secret door sort of.. the point is to allow me to open the false floor without taking everything out allowing me to have access to the jack/tools to change my wheel...

drawn in the diagram is the set up.. the bottom rectangle is where the door would flap up.. the red lines are representing the hinges.. the hinges i have are smaller versions of like door hinges.. the blue things are fans to keep the amp and cap cool under the false floor...

now my problem is how can i mount the hinges (or anything else you can recommend) to sort of sit flush with the floor... right now the floors is 1/2 mdf and the door is 1/8. i dont mind if the rounded part of the hinge juts out but i want to concel it as much as possible... any suggestions?

thanks in advance