when you loaded the file into Poser it(the daz loader) probably moved the textures into the textures directory of poser. make note of what Carrara is asking for then go to the Poser runtime textures directory and Look for them there by by doing a search for the files in question. You will need to copy them into the same directory as the .obj and associated .mtl file (the .mtl should reference the same files Carrara is looking for). There's also something called transposer but I don't know what that's about as it is only for C3.