Currently progress is going a bit slow as I am still learning on how to properly use the (Jack) Hammer Editor however it's not too slow, the currently available images show what I was able to make in little over a week so hopefully I can have this project completed sooner rather than later.
Nice mapping! But there are a couple of things looking not so good: pitch black polygons and pipes textures mismatch. I'd recommend to read this article on Sven Manor, dedicated to advanced lighting: Sites.google.com.
And for the textures thing: try to select a pipe side with LKM (while in texture editing) and then apply the texture on the next side by ALT + RMB, that will do the trick.