Hi,
I have not used Arroway textures but I would suggest the following workflow:
Change your material type to "Phong". This is appropriate for any wood material.
Change your albedo map to the Arroway diffuse map
Change your bump map to the Arroway bump map. Input a low bump value (Remember the value is set in meters so try something like 0.001 initially)
Change your exponent map to the Arroway reflectivity map. Experiment with different values until you are satisfied.
Good luck! You might get a better answer from some of the experienced users at the Indigo Forum.