USS Enterprise, Constitution Class Model, Need Some Help

Hello everyone. I've been working on a Constitution Class from Star Trek TMP era and wanted to post it for com crits plus I had a few questions. I'm using Stannum's 3dsmax exporter v. 1.01. I had some trouble with the 2.0a version and could never get the models to load without the game crashing. Anyway my ships come in ok, but there are some issues with the textures. I've listed some images below. There seems to be sections of the hull that become very dark, almost black from various angles. Is this a problem with the modeling or the texturing? Also is there any way to correct the problems that are occuring with the mesh smoothing in some areas? Any thoughts would be helpful.