This was kind of a whim that ASTEK got me started on, and it looked like fun at the time.
Included is everything you need to make a 747(kinda) airplane for a quick level. Dimensions, especially isle widths and heights had to be changed to allow for that big ball who is "FPSC guy" to be able to navigate through the plane. It couldn't be helped. Vanilla FPSC should have the feature to change the camera height at least.
This is an "inside only" level as you will quickly see when you step outside the plane and it disappears ( A Klingon cloaking technology that I can't discuss with you. You don't have clearance.) so stay inside the plane. The windows are real so you can place segments around the outside to suite or keep it dark out there. You could make a cream colored plane to place on the side wall to act as window shades.
The pack comes with an installer. As always, watch your install path and make any necessary changes, especially to the X10 directory. It looks better in X10 than these screen shots which were taken in X9.
This and more is available on fpsFREE.com at the top of the free entities list. Do not redistribute without permission. Enjoy.
EDIT: This could be a little confusing so I've attached a Step-by-Step PDF Guide to this post.
Brian.