Testing my custom map

[FalknerEffect]

So I'm halfway finished with my first custom scenario for RA, only issue now is haven't found a way to test it. How exactly do I access custom-made maps from the game itself? I have been able to access it via the Skirmish option, but it doesn't really seem to work out too well. I know I need to create an .mix file in order to make it accessible via the Custom Missions option, but I'm not sure how. Can anyone give me a quick rundown?

[FalknerEffect]

Alright, I managed to find a way to test the map, but now I've hit a new snag: the enemy units won't attack or fight back against me. They'll just stand there and let my guys mow them down. Any idea what's causing this?

[Salvation]

Have you set unit status guard / area guard ? Also you must create triggers / teamtypes, if you want that enemy creates units and send them against you.