sometime when I play with mike 2 too long,the strange thing happen: when I change the skinhead texture, the skinbody also switch to skinhead's texture as well.same thing, if I change the body texture, the head's texture change to body's texture too, so wired. any suggestions?

I have had that happen too. Not with Mike, but other figures. I figured out that When I had a different figure or prop selected and checked apply to whole figure, then changed figures, that check box would stay checked. So to stop this you have to check apply to whole figue, select a different body part of the same figure (to make the cange stick) then uncheck the box. That way when you change figures Poser don't get too confused.

Check the material properties window that you do not have the box "texture changes apply to entire figure" checked. If it is checked, uncheck it.

I find the Mill figures have more Head materials than body, so I usually apply the head skinhead texture with the box checked, then go back & uncheck it before applying the body textures individually. The P4 stock figures, having only one texture per form, you can leave the box checked.