Mace, the body area of the texturemap tells the whole story: you're putting a planar projection through a lot've areas that are perpindicular to the projection, which naturally leads to distortion and smeared textures. This model needs to be Exploded in a modeler that supports that operation and re-grouped and re-projected.

What I do to fix this (assuming you are using uvmapper classic) is this.
Lets say the wings are one group and you mapped them planar to see them from the top. The edges of the wings of the wings are as Argh said perpendicular. This means that one pixel of your skin will cover the entire width of the edge. That's what's making those streaks.
After you map your wings, move them to the side and highlight only half the wing. When you drag it away you will see the line representing that perpendicular face left behind, as long as it wasn't highlighted with the rest of the wing. You can then remap that face planar using a different axis. This is kinda like using a box map but puts you more in control of how it lays out. Repeat this process for the rest of the perpendicular edges and you should be good to go.
When you do this, space get's to be an issue so what I do is focus on one area at a time. I might take the wings and map them out the way I want. When I'm done I highlight the entire group of faces and shrink them down really small. This gives me room to work on the next part of the ship. After I'm done I just grab each group and make them big again.