I haven't exported very many things out to .x, but I believe you'll need to texture it within FPSC as the .x file format doesn't package the texture with it. Make the model, unwrap it, texture it, export .x, import it into FPSC and then import the correct texture. When you apply the texture inside FPSC, it will all line up correctly because of the UV Data. I've never used FPSC, but there should be a way to apply textures... it's a game engine after all
"If I have seen a little further it is by standing on the shoulders of Giants" - Isaac Newton
-Degrees: Computer Animation-