I've got a single massive monitor at home, and I've decided to mimic the Windows 7 window tiling shortcuts. I found a few guides online using wmctrl, and it's going well, save one thing: maximized windows don't respond to it.

gconftool-2 
--type string 
--set /apps/metacity/keybinding_commands/command_1 
"wmctrl 
   -r :ACTIVE: 
   -e 0,
      0,0,
      `xwininfo -root | grep Width | awk '{ print ($2/2)}'`,
      `xwininfo -root | grep Height | awk '{ print $2 }'`"

(I've added line returns to make an otherwise massive one-liner readable.) I've bound this to a hotkey and it works, unless the window is maximized. Any ideas on how to fix this up?