I used to bring them over by exporting them figures as .obj files. It works great with exception of having to do a little reworking of the eye transparency. However, once you've made the texture map changes, you can simply reapply them to a new .obj import to avoid doing it all over again. The difference between TransPoser and doing the .obj thing is that TransPoser extension updates figure changes done in Poser and imports all of the textures correctly - including transparency. The .obj option forces you to export over and over if you are tweaking a pose.