Please see the most recent updates in the "Where did the .com name go?" thread. Posts number 16 and 17.
I barely understood the dds texturing, let alone a bump map, is it simply a case of labeling it "bump.dds" or is there more to it. Don't have a clue. As for the bare metal, I'm not doing a bare metal. . .there is no reflectivity in Tim's model so my attempts at bare metal were futile.. . . . .The line work and rivets are a bit heavy on the diffuse texture. If you could throw those over onto a bump map and tune it down to almost nothing on the diffuse, it will dramatically improve the effect, especially on your bare metal livery.