Graphics oversized with my LCD TV as second monitor

Help! I am using my Samsung 40 inch TV as a second monitor. No matter what pixel config I do the screen is oversized. For example, if I use the Samsung as my main monitor the menu bar at the top is off the screen and I can barley see the tops of the the dock icons. When I was using the Tiger operating system under monitor system preferences there was some kind of box I could check to not oversize the screen. This would downsize the screen on the TV (which left about an inch border of black all around), but was good because everything fit like it was on the mac screen. Now since I have updated to Leopard I cannot find this option. Is there any way I can get it back to the way it used to be?
Thanks,
Trenton

This might help: http://discussions.apple.com/thread.jspa?messageID=9007176
It seems like the problem is very TV-specific.

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