The software should be ARC-500. If you navigate to the TRS, and set the tables to custom and then double click, it should give you the option to set rebanding tables! There should be a drop Down list that will have something like "800 rebanded." Select that, and then see below (after the WIN-500 stuff)!
I would recommend downloading the trial of Win-500 and using that!
It is much easier!
Make sure the tables are set, and then ensure that the systems tables say "custom."
Then load that to your scanner, and you are done!