Attached Link: a little problem with OBJ import

Hello, a little problem with OBJ import. I've created a suitcase in MAX. I made two files of it so it was much easier to paint in the UV-Maps. I import both files in Poser and aply the texture-maps on it. How do I make one file of it ? When I export as obj and reload it I have one object but only one texture-map is applied. What is here to do ?