Sorry that these pictures aren't the greatest quality. I was using a laptop and webcam to snap these pictures since I did not have my "good" digital camera with me at the time.
The basic start of the frame with more of the pre-cut pieces waiting for assembly
The stand fully assembled. The 6 - 23" sections support the middle of the long sections and the four corners. The other 2 - 15" sections support the middle of the top and bottom. The last 48" section is the diagonal on the back to keep the frame "squared". While assembling, regularly measure the diagonals on both sides and the front/back to make sure the stand is "squared" properly (the diagonal measurements should be the same) before tightening up the screws completely. I put the "L" legs at each inside front corner to give the stand adequate resistance from going out of square in the front. A diagonal would be best but I wanted the front open for the eventual doors.