Here are my pictures but I will edit at a later time; to include Prelude's pictures - to make for a complete walk-thru. Mine just complement his.
The full set of installation pictures by Prelude are available here:
2005 Subaru Legacy GT install - MP3Car.com Forums
As you can see; I had to cut the edges off the housing of the monitor. I also had to cut the upper left/right hand corners; to be able to "lift" the monitor - and have access at the front panel buttons (these functions are also available thru the remote control)
I have modest goals in mind. The picture showing the screen already installed in the car represents my targeted end-result: Prelude's install (although he has since revised it).