pupil said:
Basically, after processing the d2v through this avs script, I am left with an image that isn't anamorphic and has the black borders around the image.

The output of the script is truely anamorphic (that's why everyone looks thin and streched if your player plays it back as a 4x3 image and doesn't apply the anamorphic filter). The black bars are due to the fact that SW is not in 16x9 aspect ratio, it's actually even "wider", so some black bars are required on the top and bottom to fill the rest of a 16x9 field. Probably your best bet would be to add another resize at the end of the script instead of your crop to do what a DVD player does when is sees the anamorphic flag.

Spline16Resize(960,480) #for NTSC

Spline16Resize(960,576) #for PAL

-G