Boy, that's a big save. Thanks for going through all that trouble. I'll get right on it.
Looks like firing Federov is the crash point. I think if the day was the crash point the game would crash before the day started. I tried dumping all programs out of memory with a program called Enditall but it didn't work either. I tried cancelling all tasks for the day but it looks like it's set in stone. Unless you can hex edit the save game. It doesn't look to good.
I'll check it out more and give you a verdict.
Update: Tried a savegame editor but it doesn't work. The game instantly crashes.
Update: There's just not enough time to prevent it from happening. I tried hex editing the mainobject.ros file but it looks like it's encrypted. My plan was to edit the time so it would give an extra minute or 2 to cancel the action or directly cancel the action through hex editing but I couldn't. I'm going to try one last thing.
Update: Sorry to say it but firing that Federov guy doomed your game. Looks like it's a bug. It could be a combination of dependants on that one character. Getting rid of him causes it all to collapse. Either don't hire him next time or keep him through the game. Never use one save slot for your entire game playing period. I learned that lesson the hard way playing System Shock 2. Imagine how pissed I was when I was almost done with the game and got a corrupt saved game.