First, start a new war party, selecting whatever heroes you want, and then
add all five swordsmen. Second, use a Hex editor to edit the Swordsman
definition in the savegame and change the following items to the values
shown. Once that is done, you can return to the game and load the savegame
and sell the Swordsmen back for 65K each in gold.
Here are the items to look for and the values to change them to: