Using this Trainer:

Launch the trainer first, then launch the Game and then Press F1 at the Main Menu.

Listen for "Activated".

Press desired option key

Options Working In Promo:

Numpad 4 : No Population Cap

Options:

Numpad 1 : Allow FOW

Numpad 2 : Unlimited Requisition

Numpad 3 : Unlimited Power

Numpad 4 : No Population Cap

Numpad 5 : Special Unit Powers

Numpad 6 : Instant Units/Upgrades

Numpad 7 : Unit Refills

Numpad 8 : Instant Buildings

F1 : Invincible Unit On

F2 : Invincible Unit Off

F3 : Soul Replenish

F4 : Soul Drain

Numpad 9 : Planetary Requisition

Numpad .  : Complete WarGear

Numpad + : Steal Technology 

Numpad 0 : Enemy Mind Control

Numpad /  : Morale Manipulation

Numpad * : Rapid Special Abilities

Notes:

If trainer does not appear to be working, you may need to close it and run it again.

Numpad 1- Activate Menu for Fog Of War option. You can then Press the FOW button and then it's best to deactivate this for the remainder of the match.

Numpad 2- Make Requisition Unlimited

Numpad 3- Make Power Unlimited

Numpad 4- Remove Unit Cap

Numpad 5 : Special Unit Powers - Gives unlimited Soul Essence, Orc Waaaghh, and Sister's Faith.

Numpad 6- Activate Instant Creation of Troops

Numpad 7- Activate Instant Refill of Squad Spaces for Troops that have fallen.

Numpad 8- Activate Instant Build of Buildings.  VERY IMPORTANT:  It is necessary to click twice on the space where the building is being built to make it build instantly, however you must wait until the builder has already begun building the structure.  If the unit is far away from the build site, you must wait until the unit is at the site and building before the second click.  This is the only way I could make it where the enemy doesn't get the same benefits.  Also, if you double click before the builder is at the building site, the building may not complete and you will have to destroy it.

Numpad 9 : Planetary Requisition - Gives you unlimited Planetary Requisition for the Campaign mode.

Numpad . : Complete WarGear - you must have at least 1 WarGear Point.  Access the WarGear screen and then press this option and you will be able to select all WarGear options.

Numpad + : Steal Technology - Press this button to cycle through all the known Dawn of War factions technologies when you are building.  Create an army that is a mixture of many races and technologies!

Numpad 0 : Enemy Mind Control - Selected Unit will be under your control when you have this option activated.

Numpad /  : Morale Manipulation - Press once and you will increase the moral of the unit selected.  Press again and you will degrade the morale of the unit selected. Press again to turn it off.

Numpad * : Rapid Special Abilities - While this option is activated you will notice that the unit special abilities recharge more quickly for many of the units and many of their special abilities.  May not work instantly or for all units.

Options F1-F4- These work on buildings and troops, both friendly and enemy!  Select the troop or units (you must select by clicking on the structure on unit with the mouse) and then press the associated key.  You cannot select units by dragging a box around them for this to work, you must select each unit/squad/building to apply these options to.  F1 and F2 toggle the invincibility of the unit.  F3 will instantly heal the unit and F4 will instantly drain the unit of life.