here's an update with new curves. all surfaces were made with curve network except for one. that was done with planar curves. with the updated curves you can mirror the geometry easily. i used what burrman showed to get the beam/crease/bump. i got the missing curves from that step.

Edit; fixed the curves some more. The front curve for the top of the hood is odd. It's from the original curve. It's hard to change at this point, without screwing a bunch of stuff up. But this at least gives the general idea.