This is done with a default FSX feature.
FSX let's you move your eyepoint in VC view.
So you can 'walk' through your aircraft using these commands.

The standard commands for this are:
move back: CTRL + ENTER
move down: shift + backspace
move forward: CTRL + backspace
move left: CTRL + shift + backspace
move right: CTRL + shift + ENTER
move up: shift + ENTER
reset: CTRL + space

or just look in the controls  'eyepoint' commands.

Hope I helped...

Tyrion