Remembering setting on external monitor/display

MacBookPro 2.4GHz 2 duo w/ Leopard:
I use an external monitor (samsung, older) at work; sometimes my computer remembers my display settings (i.e. automatically sets to the correct resolution and arrangement) and sometimes it doesn't. I haven't been able to find a pattern.
Is there any way to make it remember all the time?
Thanks.

A search over at <http://versiontracker.com> turns up
SwitchResX
<http://www.versiontracker.com/dyn/moreinfo/macosx/15467>
Display Maestro
<http://www.versiontracker.com/dyn/moreinfo/macosx/10910363>
DisplayConfigX
<http://www.versiontracker.com/dyn/moreinfo/macosx/21600>

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translate.google.com.
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http://discussions.apple.com/ann.jspa?annID=650
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Remembering setting on external monitor/display

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