Okay, lets go with what you dont need. Thats easier. The LCD, the keyboard and top cover(mouse), the battery, and the modem.. Keep the lower bottom cover with the logic board. That will keep everything well grounded and its just plain easier. You could add a small touch screen to the vga output. BUT, why loose a great laptop! You could add a remote video box to your tv that accepts signals from your powerbook. I myself would keep it in one piece, well unless it was already broken.
-maestro