Activating this trainer:

Press F1 at main menu.

Listen for 'Trainer Activated'.

Press desired hotkey. All hotkeys can be changed on the trainer.

Options (Trainer):

NumPad1: Change Money By 50000
NumPad2: Fast Project Progress
NumPad3: Change Resources Modifier By 5
NumPad4: Change HDI Level By 50
NumPad5: Change GDI Modifier By 1
NumPad6: Change Population Modifier By 1
NumPad7: Change Army Limit Modifier By 1
NumPad8: Change Score Points By 500
NumPad9: Change Action Points By 500
NumPad0: Change Natural Resources By 500
NumPad/: Change HDI By 500
NumPad*: Change GDP By 500

Editor Options:
Misc: Score Points
Misc: Action Points
Misc: Population Grow
Misc: Population Grow Modifier
Misc: Army Limit Modifier
Misc: Money
Misc: Natural Resources
Misc: Resources Modifier
Misc: HDI
Misc: HDI Level
Misc: GDP
Misc: GDPGrow
Misc: GDPGrow Modifier

Notes:
Values will not change immediately you have to wait for the game to update them.