Jetranger, the reason why the AVIA doesn't have Viewpoints was because it was not designed for FSX it was designed for FS9; this is just a FSX port-over.
BTW you can move about in the Cabin by pressing Shift + Backspace, Shift + Enter, Ctrl + Backspace, Ctrl + Enter, Ctrl + Shift + Backspace & Ctrl + Shift + Enter.
Intel Core i5-2310 CPU @ 2.90GHz, 6GB RAM, AMD Radeon HD 6450, Windows 7 Professional 64 bit, Logitech Extreme 3D Pro