OK - Hinges 101
You might want to go look at some 1:1 scale trunk hinges. You will see a pair of curved arms attached to the lid and rotating in pivots attached to the coachwork.
Bend a piece of 1mm wire (hey! a paperclip might just be the right size!)into a rectangle. Make one side somewhat shorter than the width of the trunk opening. Bend the two arms at right angles, measure about 1/4" or 6mm and bend them inward again.
Bend the two short sides into matching curves. Bend the loose ends so that they fit the contour of the inside of the lid with the wire arcs pointing down. Seen from the side, the CENTER of the arcs should be at the very front edge of the lid.
Now, tape the lid in place. CA glue the wire to the inside of the lid. The very front portion of the wire should now be resting on the coachwork just in front of the trunk opening. Slice a section of 1mm I.D. plastic tubing in half lengthwise, then cut it to fit just between the arcs of the wire. CAREFULLY CA glue the tube the coachwork.
When the glue is set, you should be able to lift the lid which will glide upward in a graceful arc.
You may need to play with the curve of the arcs so that they don't intrude too far into the cavity and impinge on your electrics. Also, a plasticard lip on the inside will prevent the lid from falling through. A bit of steel CA glued along the far inner lip of the lid, and a sliver of refrigerator magnet CA glued to the coachwork will act as a latch.
Good luck, and POST SOME PICS!
Phil