little mod demanding (Hotseat mp for Kingdoms)

hi guys,
me and some friends of mine want to start a crusader hotseat multi campaign, and we wanna try to resolve battles via lan. to do this, we need to have the merc units available in the army lists of custom battles. Is this possible to do with a mod? Can anyone do that for us? I really can't mod even because medmanager doesn't work on my pc. All we need is to make all merc units of crusader campaign available to every faction army. Has anyone a pair of free hours to dedicate us? that would be really appreciated!! :help: