I did a planar unwrap. I didn't worry about perfect unwrapping at this point; I simply wanted to define my unwrap seams while I had the correct polygons selected, to save time.
Defining my unwrap seams
Here you can see a simple part of the model - the hood - that I've chosen to explain some of the steps that I followed to create my textures. I used textures from the 3DTotal Textures V08:R2 - Vehicles DVD