It seems also that Warlords do not handle xml cashing correctly. So, for this (and every other game in general) to work correctly, it has to be loaded with xml cashing turned off. holding down the shift key while loading is not enough since some xml or other settings are not correclt loaded in the case.
This scenario is hence essentially unplayable in hotseat due to different tech trees which are not properly refreshed on the F6 screen but tool bar on top still allows to make a correct choice of tech to research.
