There will be a beveled strip running around the inside of the window frame,use a wide wood chisel or similar and push it between the strip and the frame starting in the middle of one of the long sides,twist the chisel and the strip will pop off,prise it out sideways(toward the middle of the window)it will be obvious once you start,the glass will probably be sitting on small plastic spacers,refit is only a matter of pushing the strip back in short ends first.Good luck.
Rich, May 2010
