Dual head, Possible with TRS'06

Can it be done? I have a dual head setup using two 17" LCD monitors on my ATI All In Wonder X800xl. How do you get trainz to spread out over the second monitor?
I understand the issues that this may cause including slower performance but I still want to see for myself.

If you desktop is extended to 2nd monitor, then see if the total resolution shows up in trainz config..