You need to create a new [CameraDefinition.XXX] similar to this:

[CameraDefinition.004]
Title = "Galley/Lavatory"
Guid = {C04D95DF-E5A4-4183-B678-B59D95EA2105}
Origin = Virtual Cockpit
MomentumEffect = YES
SnapPbhAdjust = Swivel
SnapPbhReturn = False
PanPbhAdjust = Swivel
PanPbhReturn = False
Track = None
ShowAxis = YES
AllowZoom = TRUE
InitialZoom = .5
SmoothZoomTime = 2.0
ZoomPanScalar = 1.0
ShowWeather = Yes
XyzAdjust = TRUE
ShowLensFlare=FALSE
Category = Cockpit
PitchPanRate=20
HeadingPanRate=60
InitialXyz=0.3, 0.50, -3.13
InitialPbh=2, 0, 180
xyzRate=0.5

You will need to use [CameraDefinition.005] - the next consecutive number for the interior views (.001 through .004, so the next is .005).
Give it a new title and name it "over the wing view" or something like that
You will need to generate a new GUID - I do it here: http://www.guidgenerator.com/
InitialXyz=0.3, 0.50, -3.13 is the location of the view in feet - forward/backward, left/right and up/down
InitialPbh=2, 0, 180 is the direction of the view in degrees - pitch, bank and heading

Those are the five key points to creating a new view. Because the 757 only has a first class cabin, I doubt you can get an over the wing view without have it behind the cabin itself.

Mark