Thanks for that, didn't think of it- A dust cover/aerodynamics helper, according to this thread: Yahoo! Groups
Thats the rail cover underneath the doors. If you run over a curb it will come off. This happened to me before when it was dark.
In the case of these parts they're definitely part of the shroud under the engine and just behind the grill. Thanks for responding though.
Just to revive this thread, obviously both the yahoo group and tinypic are dead now, does anybody know what these plates are, what their codes are etc? Running from the bumper to the engine splashguard.