| Well, it all depends ...
on what your video adapter driver allows you to do.
Step 1 is to realise you can set your monitor settings seperately ...
in the 'display properties' dialog witht he 'settings' tab selected, you should see a grey box with your monitor shown as '1' and '2' (say)
You may be able to click on each of them and set (a few) properties up seperately.
As a developer, I (ands loads of others) have run 2 and 3 monitor systems quite a bit, but almost always as big extended desktops.
In this situation, you use a setting like 'extend my desktop onto this monitor'
I think what you want is a 'slave' of your first monitor, but neither of the display adapters on my 2 systems here at home have that kind of setting :-))
I'll have a look a work (on yet another system) for you tomorrow | 
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