1-Would it be possible to make a unit shoot at you only if you shoot them first?

2-Can you change the size of your map?

1-No, not without a lot of scripting, and at that point it's not worth it.

2-yes, go into ZE, go to terrain size, new terrain, type in something with the power of 2, and now ur map is that size, textureless of course...

Thanks!