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!