Change the support costs of the units in the CRUSADERS_UNIT_PROD11 in your totalwar folder (best use gnome editor or something). Youd better change support costs since then there are really fewer units. Also if u change the units cost, u'll get a lot of money after a battle (which you won of course). I once changed the costs of peasants to really much, but after defeating some rebel peasants i soon found a huge pile of florins in my chest.