That depends on a couple things. Here's your options how I see it:
1) If you're good with fiberglass or bondo, you could remold your dash and put the screen just about anywhere you want. This option allows the most freedom, but is also the most work. The possibilities are endless.
2) If you want it to be hidden or not visible all of the time, you need an in-dash unit like www.digitalww.com DWW-7VGA.
3) If you don't mind it being out where everyone can see it, then just buy a Xenarc or Lillyput and mount where ever visibility is good for you. You can glue the mount to the dash, or use one of those angled brackets that bolts in behind the dash and comes out one of the cracks between dash panels.
4) There are also a few screens that mount in the visor. I don't know if any are availible in VGA or just PAL/NTSC.
That's the short list of the popular methods. Hope it helps.
If it were me, I would move the stereo down to the blank storage slot you have below the climate controls, and put an in-dash screen in the radio's former DIN slot. That's going to be the cleanest option with the least work. Of course, there are guys in the forum that would tear out the whole center section of the dash and make a new one with a screen built right into it. I'm too lazy for that!!