Also, this is a special scenario for me, check out the second courier message.

Yeah that's a VERY memory intensive scenario. Does it always crash in the same place? Are you able to reproduce the crash with an autosave? You probably already know this, but try lowering your graphic settings (trees 30 or less, draw distance 800 or 900, sight distance medium).. I know it won't be as pretty, but you should be able to at least complete it.now if I can get Jackson to complete without crashing . . . .
Steve