Hello there guys,
I have registered just to let ybou know the solution that I found on this long lasting photoshop fullscreen issue :-)
Default Matrox PowerDesk will not help you, same as writing to adobe or matrox and even the nice and small app called MaxTo is useless for this..
You need to download a program called
http://www.splitview.com/
Configure your resolution/split area in there so it will maximize applications as your PowerDesk before.
Start your photoshop (in my case I tested this with cs3 and cs5 and win7 64bit) open something and go to desired fullscreen mode.
It will still fullscreen opened document to all your monitors BUT here comes the good part, press Windows_key+Left or Right_arrow and it will move the whole fullscreen photoshop to your left or right monitor :wink: and thats it! it will stay fullscreen and on your prefered monitor untill you change the fullscreen again, then you will have to again press the winkey+left/right_arrow but it still better than have the document opened across all the screens.
There was one small issue that I had that when I first pressed the winkey+arrow it wont move the photoshop to left or right screen, but it just moved it a few pixels left or right. In this case you can just grab the border that will appear and scale it manualy while the document is in fullscreen :D This only happened once right after installation and after restart it worked like like described above..
hope this helps somebody as it did to me
btw pic attached:
btw i use triplehead2go but only have 2 monitors