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Obviously, converting 170px to a percentage is dependant upon the screen res (on a 1024x768 it would be right around 17%). Did you edit the CSS sheet for the forum itself? I started down that road, but quickly realized I'd have to either let anything I put in the center inherit the same settings(if it used the same classes) or create new classes and edit every template in the message board. My point is, if you tweaked that at all, you'll also have to adjust it in the other templates...which is daunting.