Simplified noob question about editor
 

Given that I want to create small battle on the west front or in Italy I'm buying MoW. My basic question about the editor ...

Let's say I want to make a simple, single player attack/defence style scenario. One of Brit/US/Canuck vs German in Normandy (or Brits vs Germans in north Italy, late 44) with a small set of fixed forces. I want one side to be the static defenders (let's assume that these will be the AI) and one side to be the attackers.

The attackers will win if: They reach a specific objective point on the map (a trigger? EDIT ... I partly see that I can easily set up a zone after watching this video ... http://www.youtube.com/watch?v=VCVa0za3Lkw ... so I assume that setting a simple condition to that zone like "when player side X gets here it's a win" is also easy). [Maybe, also, the defenders win if they eliminate certain units or a % of the attacking forces.]

Ignoring the creating the map part, how easy is this to create?

Thanks.