You have shown a screen where actually the widget widths are set precisely and there is not much you can do. That's odd, though, because the width of the player's image field is 480 px, so I'm guessing that game is scaling your screen somewhere to a width of about 1200 px (layout="480,2,-1,2,480"). And it is hardly the skin's fault.
Can you show the player profile (not the attributes panel) on your Macbook pro?