Did you follow the steps in the DK2 Setup Guide in the vorpX help? It explains two possible setups for getting the image to the Rift (short version below). You can also select the output adapter in the FSX graphics options.
Regarding looking around: you have to be in a cockpit view and then enable mouselook. The default FSX shortcut for that is [SHIFT][O] (Oscar).
You have two options to use vorpX:
A. The convenient one (works with most games)
1. Set the Rift DK2 to “Extend Desktop to HMD”
2. Use the Rift DK2 as SECONDARY monitor in Windows
3. Set the Rift DK2 to “Portrait” mode in Windows
(might be “Landscape flipped” in Windows 8)
4. Set vorpX to “Show on DK2″ display wise in the vorpX config app.
B. The compatible one
1. Set the Rift DK2 to “Extend Desktop to HMD”
2. Use the Rift DK2 as PRIMARY monitor in Windows
3. Set the Rift DK2 to “Portrait” mode in Windows
(might be “Landscape flipped” in Windows 8)
4. Set vorpX to “Use system settings” display wise in the vorpX config app.
It is important to choose the right setting in the vorpX config app according to your display settings in Windows. It is important to choose the right setting in the vorpX config app according to your display settings in Windows.
For a more detailed guide including screenshots please check the DK2 setup guide that comes with vorpX.