The hands are easier to change by scaling, but harder to fix by magnets because there are many bones.  If you want to change hand size, the scale dials are in the figure, but they're hidden.  There's a pose file by David Eaton that unhides them so you can play with them:

http://www.renderosity.com/mod/forumpro/showthread.php?message_id=2850976&ebot_calc_page#message_2850976

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