Press Ctrl-F12 and enter these codes at the prompt:

PILE IT ON - Add resources
Q40 - Research everything
GREEBLIE - Complete research on the current project
WALL2WALL - Max population
LEO - Show resources/military units in enemy territories
BIGBRO - View any territory
CHARISMA - Be friends with all computer players
S-MART - Skirineen appears immediately
SQUISH - Win scenario

Note: These codes do not work in Campaign Mode.