First you need to go into the scenerio save it and exit. Go into My Computer and to EE save games then cut and paste in the scenerios and rename it so that it is a scenerio. Now that its a scenerio you can use the scenerio editor and give yourself legions of troops and take theres away. Now go to play scenerio and play it. It should be much easier and once you win you will be able to go to the next scenerio.