Someone has discovered an issue with my campaign: a crash when selecting mission 10 after completing missions 9a or 9b ("Ashes To Ashes" or "Dust To Dust" respectively). I've provided an interim fix here, and the link to that updated file can also be found under the Campaign - Downloads section. Just place the updated file into your Red Alert directory. That should stop the crashes at that point.
Looks like there will be future versions of the campaign to get rid of little bugs like that :)