Greetings.
That request is a bit outside the scope of this plugin. I'd recommend Yanfly's change battle equip plugin, or possibly this free plugin by Jeneeus Guruman on the rpg maker forums for changing equipment mid-battle.
As far as I'm aware, this plugin should be compatible with either of those. If that isn't the case, let me know and I'll see what I can do to fix it.
-Ramza