okay, i figured it out, but unfortunately it won't work for me anymore.
the most important thing is YOU NEED YOUR CUSTOMER NUMBER.
if you've placed an order w/ staples before, just call 8003staple, and ask for your customer number.
then call back to place the order.
when you apply the $100 coupon, they will first ask for the initial 5 digits (which you can get off bens)
then, they will ask you for the other numbers on the coupon: give them your customer number and then add a 2 at the end. this way the customer number will match the coupon.
but you may not be able to do this if you've called them and tried to get other CSRs. the staples computer system shows the orders you have tried to make. so the last time i called, that biyatch conferenced a manager on the call (without telling me!), and asked for my business rewards number. then i told them i had another call on the line, and i put them on hold for about 4 minutes before they hung up (hehehehehe).
anyway, good luck to all who can get this deal. unfortunately i cant.