Thanks everyone. I don't really need a theme...I just wanted to move the icons I'd be using regularly to the top. I did figure it out eventually, but I knew you all would be able to help if I couldn't.
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stock zen, "L" and Today Plus icons are based on the order of the icons on your main icon screen. usually the first 5 to 6 icons on the icon screen dictate the icons on the home screen.
you can reorder your icons on the icon screen, and thus the home screen, by rearranging the first 5 or six icons using menu > move, moving it with the trackball, and releasing it by pressing the trackball.