why in the world would you want to roll your odometer forward?

I'm not sure about your accord, but on a ~90 civic the speedo/odometer has a cable that goes into the tranny. It hooks into a removable gear type device that holds the cable and spins it according to the transmission speed. So if you take out that cable and hook it up to a drill you can add some miles. Although it would work I think it would take ages and a lot of drills to get to 91k.

I would just leave it, and if u are trying to sell your car fairly then get an invoice from the dealer with the origional miles at the time of change.