Cheating!

I want to see the outro video for the Dark Avatar campaign but I don't want to play through the entire campaign (to this point I've just been going through it in cakewalk mode but now I've got to a gigantic map, I can't be bothered anymore!).

The video won't play outside of the game on my PC, so cheating seems like my best bet, but I can't seem to get it to work on my computer!  I've set up a shortcut and changed it's target as I hear you have to to the cheat mode.  There was another similar line labelled 'start in' which could not be changed.

I started the game as normal but still cannot cheat!  What am I missing?  Please, someone treat me like a simpleten and give me a step-by-step guide to cheating right down to which keys to press and when to carry out your first cheat!

Thankyou,

Kev

ps I also tried youtube just for the video to no avail