No, it's not a technically accurate model--I was just using it as a tool to look at some equal tempered scales for instruments with non-harmonic spectra.  I was using the patch posted by Julian, here:
http://lists.puredata.info/pipermail/pd-list/2006-05/038620.html

I just made an assumption about the additivity of dissonance from pairs of frequencies in complex tones.  Each pair of tones in the patch contributes an amount of dissonance (which depends on the frequencies) that's multiplied by the square root of the product of the amplitudes.

Chuck