Just that one change? Not that I'm aware of, though it would be easily done. If I'm not mistaken though Tekk Zero's
Mapmakers Additions enables that, as well as access to some heroes and other features normally found only in the campaign. Be aware though that it is only intended to be used in map creation and not during normal game play as it will also allow you to select upgrades and IIRC staring skills that you would not normally be able to.
Unlike AoW/SM, AoW1 has no built-in provision for tracking mod versions, and using this or any other mod during tournament or other competitive play would normally be disallowed, though making a map for tournament use with it would probably be okay.
See the readme files for instructions on installing and switching it in and out, though I can't vouch for whether they work for the latest version of Windoze.
ChowGuy - The LaChoy Dragon - Servant of the Tiger and disciple of the Wanderer
The Hall of Wonders - HeavenGames Fantasy Role Playing and Creative Writing Forum