I tried Sanders McNew's method of scanning on one of the above:
1. Emulsion side down, weighted with coins
2. Scanned at 4800 dpi with USM off
3. Flipped image horizontally in CS3 + cleaned up image of artifacts, etc.
This is the full image including the sprocket holes but are pretty much invisible,
then resized/sharpened (USM was done on larger file in CS3). I think there is
less noise in this image than the first pic in the above set, but I might be wrong.