Seperate Pics for two different Attributes?

I have two different attributes under variations for buttons: Style (pinback or magnet) and the character to select for your button. So I was able to have a screen shot for each character, so customers of course can see which they chose as they select 'em. Unless I missed something, I can't have screen shots for style (a picture of the magnet and a picture of the pinback). When I choose pics for these two styles, it warns about removing all the character screen shots. Is there any way to have screen shots for both attribute's options? Thanks!