I think he meant, as in to duplicate the swords, meaning having more that one, than rathing hastening yourself twice as faster.
Its quite simple really, you just need ramza to be knight with the ability two-swords. * i think it was sword, or hands, experimint with both* then equip the weakest shield on the left hand or was it the right? * well whatever hand is the first hand at the equip menu at the top* and equip excalibur at the right hand.
Go to the nearest castle, and do best fit on ramza, it should come up with excalibur replacing the sheild and the best weapon that castle has to offer on the other right hand. press yes, and now check your inventory screen
ohmawgawd, two excaliburs, yay!
I think im right ;.;