I'm releasing both the model files and the source files for this model. There are a few reasons for this, but the primary one is that I'm running out of time before the next academic semester begins, and I have to face the facts that I can't possibly find the time to finish/improve the model as is. At this point I'm leaving it up to whoever else wants to take it up.
You're free to modify the model however you want, there's a readme there in the archive that's a little more specific.
FYI, the model in it's current state is completely usable for any payload type map (and is also the same in approximate dimensions).
Check the first post for the download link/s.