Setting resolution on External Monitor

I have a Macbook Pro (from 2008) and a 25.5" Samsung T260HD which has a native resolution of 1920x1200.
I need to mirror the displays or at least have all icons and such on the external display. When I mirror them, I cannot get the external monitor to use it's native resolution. instead it uses a lesser setting.
Only when I have them set to display side by side does it use 1920x1200, but then I have to go back and forth which doesn't work for my purposes.
Thanks for advice!

when you do a mirror, you are asking for a 1:1 replication of your laptop screen. so, it's not feasable to have 2 different resolutions in mirror mode. it will only do whatever your laptop is set to.
the only MBP that will push 1920x1200 in mirror mode is a 17" HD or unibody 17". you will have to run in clamshell mode or in extended desktop to utilized the native res of the display.
Message was edited by: kmac1036

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