Normally WW will import your model and materials/textures just fine if you have all the files present and your global path settings correct. However, you may find that even with those all correct and available, some materials don't come in. I know the reason for this, but have yet to build a solution yet.
The issue is that some QC files list multiple paths for materials (multiple $cdmaterials entries). WWMT helpers only support one path. As such, WW only uses the last found in the QC. I will look into a fix in the future. I'm not sure I'm up to adding more paths into the WWMT struct for exporting... but I may be able to get the importer to at least bring the materials into Max.
Fixed in 2.763.