If the above is true, then I just need to convert the variable v (0.0-1.0) to my set of integers 0-31 based on the non-remainder part of a modulo 0.03125 calculation (or an integer division; or V%0.03125 as I vaguely recall from some maths; or whateverit's properly called - I think I remember 'modulus' and 'remainder' ?)

v = 0.0 to just below 0.03125, I = 0

v = 0.03125 to just below 0.0625, I = 1

...etc...

In Poser's Material Room of course. I don't think it's too hard, and I'm fairly sure that I've done it before. Several times. But my brain's getting rustier...

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The 3Dcheapskate (also available in DAZ and HiveWire3D flavours) occasionally posts sensible stuff. Usually by accident.
And it usually uses Poser 11, with units set to inches. Except when it's using Poser 6 or PP2014, or when its units are set to PNU.