You know, if people are actually using this, I might want to go back and see if I can make it work any better for Xvid's quants 
One thought is a the following: A CQM full of intentionally low values in order to make Xvid's QP8 equivalent to QP2 (in order to increase the quantizer resolution for moving quants up/down). This would require adjusting Xvid's internal lambda in order to compensate.