I found out that Stalratte has a tutorial in the wings forum, so someone IM me to tell me. I never look but was told it's the same way I did mine.

You can do this trick with most figures necks. The only thing would be the UV mapping. If different, you will end up with a line where the two textures meet. Postwork or remaping the head/UV's to the body would fix that.

I have so many of these type of figures.