Dual Monitor Question

I am very very new to Linux and Fedora 12 is the first OS I am working with.  Can someone explain to me in detail how to get my dual monitor setup working?  I have searched all over the internet to no avail.  I have a dell monitor and a samsung monitor.  I am not sure what video card i have and i dont know how to check or find that out since i am new to fedora.  Any help is much appreciated.

Thanks
Matt

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