I PM'ed her for directions and this is what she wrote:
Hi! Thanks! I will try and explain it the best that I can. First, take an 8 1/2 by 11 piece of cardstock and score it at 1 1/4 inch on the long vertical side. Then turn it horizontally and score at 1 1/2, then make the next panel 3 3/4, then another 1 1/2 and then another 3 3/4. this will leave you with a little bit left over for a tab to glue your box together. Turn it on the vertical end again and line the 1 1/4 inch score mark at 4 1/2 and score, then score another 1 1/2. Whatever is left over will be the flap that hangs over. You will need to remove the excess paper that won't be needed around the flap area. You assemble the box, just as you would a 2 4 6 8 box. I hope this helps.