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ColorNeg straight from the source.
If your scanner software won't delete the orange contrast mask correctly, this may work for you.
As to B&W, there generally isn't a mask to remove, so all that's left is setting the black and white points correctly and perhaps tuning the software's output curve a bit. Setting the black and white points correctly is generally critical on drum scanners, because most drum scanners use this information to set the hardware limits for the log-amp circuits. This causes the scanner to apply it's full digital range (10, 12, 14, or even 16 bits) across the limited density range you define by setting the black and white points. Whether you do this as a negative or a positive should have little meaning to the scanner because a density range is still a density range.
B&W on drum scanners generally isn't hard, but it's generally utterly non-intuitive so it takes a lot of trail-and-error testing to find out what works well and what doesn't. Experience rules when it comes to B&W from drum scanners!
The reason for this is that all scanners, from consumer flatbeds to drum scanners, are optimized for trannies. Some software also includes provisions for color negatives. Rarer still is software that includes provisions to properly handle the much smaller densities of B&W and the light scatter from metallic silver. This is why, for example, most Heidelberg operators love trannies and hate everything else -- NewColor / LinoColor isn't very negative friendly. I would expect ScanMate software to be more negative friendly since the machines were intended for smaller pre-press shops that needed more flexibility out of their scanners.