I believe that all you need to do is change the victory conditions in the triggers. Also, i always put a building for each player in a blocked off area so that you will always have a structure remaining.If you try one of these i think you will be alright.
It sounds to me like you only have 1 player in your map. If you test this out, then you would always win straight away. Go into scenario -> player properties to add more players.
I'm on a page about incorrect corrections, and spent the better part of like two hours trying to get someone to understand that -5^2 = -25, not 25, and then that post had comments get reposted because that group is self sustaining, and that person was in turn trying to explain what I just explained to them. And I'm taking that as a victory
I will be AFK for a couple of days you guys hold down the fort while I am gone. I will be checking in on my phone but that will severly limit me. Be back saturday!