OK. I have the scenario loading by the way....
I am glad to see you can get it to load, now I need to figure out why Ian cannot get it to load.
The good news is that after being away from this for a while, and getting a new computer - AMD 5 core processor, 8 gig ram, and with afresh install of AE (patched to 1126a), I loaded your versions of scenario 30 and scenario 31 successfully 3 times each. Tried historical and non historical starts.
I then opened scenario 30 in the editor and made a couple of random changes, and after that it failed to load. This might be a false negative, because I had some other programs running at that point.
After rebooting & pasting your dat files for #30 back in, it loaded happily again.
I then opened your #30 in the editor, saved it as #33, and it loaded successfully.
I also tested them using the 1126b patch - 2 good loads, but one failed and hung up after I opened a few other programs to grab some cpu space.
So, to anyone who hasn't got it working, I can only suggest this may possibly be to do with computer resources being used by background stuff.
"You may find that having is not so nearly pleasing a thing as wanting. It is not logical, but it is often true."
- Cdr Spock