Yes it is possible. However, the process I've seen demonstrated involves a freezing machine that supercools the adhesive bonding the glass to the LCD/Digitizer and allows them to be separated. The freezing machine costs about $5000 so it's an investment that only makes sense for a refurbisher or established repair shop.
Anyone know the specifications on the captive mounting screws for the heatsink? I'm doing an out-of-case build for a 2007 Mac Pro and need to know so that I can get the appropriate threading on my mounting board.