1.5 Using Style Switcher?

I know that we use “themes” now in 1.5. I like it fine. But if we want to use more than one theme, switchable, for our website, and THEN if we want to edit something in the template, we’ll have to do it more than once. Follow me? So could we revert to “styles” for one theme, somehow, so we can use a switcher that just changes the colors, images, you know?