exporting baked textures from max to unity

Im having a big problem on importing a 3ds max model with baked textures and shadows into unity 3. I dont have pro version, so im trying to fake it. However when baking is finished and i export, FBX tells me that the materials may not open in some applications. im using mental ray materials, which i've seen a guy do in the video "real time architecture visualization unity3d" on youtube. Please help someone. its an important piece to project.