You didnt add the material to the model as in when you click he model in brf you should see texture or material between the model pic and the model name: to fix this simple go to the top bar and click add material ( its in one of those options on the upper tab "edit, open" etc) and simply pick your dds file, not the normal dds nor spec dds but the dds file that is colored (the default texture) then after you have done that go to where you found add material button go to import textures and add all 3 dds files so like: brit_hats.dds , brit_hat_n.dds , brit_hat_s.dds and then after that go back to the material tab and add the title of the dds files you imported and put their names in the proper place n stands for normal and s stands for specular after that copy the material name and go back to model tab and click your model and paste the name of the material there
Good luck!
Alll this has been typed on an iPhone