1. There is no "player" AI for MoW, all PvAI is done through scripted missions. So that's impossible.
You have to play against a human opponent for any non-skirmish maps.
2. Modding community is at the DMS forums
http://digitalmindsoft.eu/forums/for...hp?101-Modding
3. you probably can play with the files, but I'd just advise you to deal with it since the US is a great faction to learn with since it forces aggressiveness.
4. The dots and arrows (vehicles, CSWs) system works well, you can adjust the map zoom in the settings
tracers for "bullets" are a nice bonus.