There are more codes than just this, these should work for Disciples II: Dark Prophecy, Gallean's Return, Rise of the Elves
To enter codes press enter while on the world map (game chat box should appear) hit enter after typing the cheat. Cheats are typed without spaces and should look like: herecomesthesun the word "cheat" will appear automatically this after you have entered it. so the chat box will read
moneyfornothing : set all rescources to 9999, all mana and gold
herecomesthesun : clears all of the fog of war
paintitblack : replenishes all fog of war
allalongthewatchtower : places spies in everyones armies
borntorun : restores all leaders move points
anotherbrickinthewall : allows you to build another structure in your capital
lifeisacarnival : resurrect all leaders and units with 1 HP
help! : heals your entire party 100%
stairwaytoheaven : automatically gives all characters level up, units and leaders **
*Leaders can only gain x amount of levels and can't exceed preset level cap for mission/level however units may level up 100+ however damage caps are set for units.
*Warning- you may carry you leader over to the next mission/level if you use this, however you can't export any leader affected by the code at the very end of your quest.