Just out of curiosity Steve, have you tried to contact Boeing for assistance, In the off-chance that you may get lucky?
I did a quick search of their website and you might be interested in this link:
www.boeing.com/commercial/aeromagazine/about.html
It wouldn't hurt to ask them if they have resources avail for your flight sim project or if they can at least point you in the proper direction for the info you require. Who knows, their P.R. dept may have heaps of data they may share with you if you can convince them that aiding you in this project would somehow be benificial to their company. Good Luck!
Anyways, the worst they can say is no. 
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