During gameplay, type KNEELBEFOREME. Then type in these codes
G - Unlimited gold
CRTL+F6 - Show full map
0103 - More peasants
Level Select
After unlocking cheat mode (if that worked), hit [F11] to enter script mode. In the script mode, type 'loadmission' and press [ENTER]. Then type the number of the level you wat to play (1 - 30). Press [F11] again to exit script mode.