Jose is a cutscene, i dont know about emmet, i think you also see him standing there at the mission where you shoot the bottles, if so, then sa-mp is able to add him to the skin list.
but i also saw one more skin that samp hasn't added to the skin list, wich IS rigged and can just be added like all the other skins:
Goto 5:33
[flash=425,350]http://www.youtube.com/v/g881eJVjsMU[/flash]
that dude you need to hunt down is rigged cuz it walks does some anims and can drive a car, plus its not a cutscene. but still its not added.