It is an old game - I'd recommend to switch before hand. There have been numerous issues regarding sounds (stereo vs 5.1, etc) and there're all of the type 'unfixable' as they are related to the engine.

And you're welcome if or when the time comes

I'm having issues playing Aeon mission Shining Star in co-op. When launching the map in a team with Common Army enabled, the map loads but never starts any script so all we see is a mostly unexplored map, with no voice over or mission objectives appearing, no ACU warps and no units to control. Seems to be frozen. In our testing it seems to work when we disable Common Army, I can reproduce this even with a bot team-mate instead of a human. Logfile from that game here. We've been playing the previous Aeon missions without any problem, and the first 2 of the UEF ones - no issues with those when Common Army is enabled.