Hey, I know its been over a year, but I finally started playing supreme commander again and extended my mod. The mod is currently updated with version 4.0.1 of the Enhanced Campaign AI mod (which is awesome) and has the first two levels playable. Installation same as before. The second mission is really freaking hard on hard, but I did manage to beat it after a bunch of tries (as cybran fyi). Good luck, and I hope at least 5 people download this.
FYI, I know that the mod summary says only the first mission works, but I can't for the life of me figure out how to change the summary. The second mission works too now.