That's really strange about the script. I have no idea why it could be causing the problem. It's probably related to the fact that the CTD doesn't always happen in the same place, but...
Wait a second. Try going into the script 4tpy file and commenting out all of the Sarmatian spawns (just search for Sarmatian). That might do the trick.
The CTD fix is fully implemented, and the hotfix won't mess it up.