HowTo:Unwrap

Thing NOT to do: Have multiple textures, like one for each material... least of all tiling textures. If you're used to modelling but never modelled for games, you might be in the habit of using multiple textures. That's a nono for ships or stations. Long story. Slows the videocard to a grinding halt. Just forget it. Totally unacceptable. You need to learn how to use your favorite tool to make a UV map unwrapping to a single texture. And if your favorite tool doesn't do it, you picked the wrong one to favor. Just drop it in favor of Blender :)

Here's a good tutorial for unwrapping in Blender:

Actually read my post about it first:

UV-mapping in Blender tutorial