You could change the field to:
{IF{=MOD({PAGE},2)}= 1 "FP-{PAGE} (FP-{={PAGE}+1} Blank)"}
You can edit the existing field code, simply by adding the '(FP-{={PAGE}+1} Blank)' part. However, whilst that will take care of the numbers on the pages themselves, your list of figures will only show:
Schematic A..........1
Schematic B..........3
Schematic C..........5
That's because the page #s in your List of Figures are the actual page #s, not what the field manipulations show.

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]