While playing press Ctrl + F12, then type in the following cheats:

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 will not work if you are in Campaign Mode!