Here is now a Tutorial, how this ambient system works. You have now 2 very mighty new options to work with the new ambient.
1. Start the Editor Mode over "Chanche UP1.5 Settings. That start EE2 with the Editor Mode, like in the pictar.
2. In Editor are now all new Ambient Units from UP1.5 under category animals. Don't wonder, it must be so, for our trick.
3. Now click on the ambient Units. She can now move like a unit. Very interesting, and it give many options for map design. You can also move a group from units.