odf,

Quote - lesbentley: That looks very useful. I thought it should be possible in principle to do that kind of thing, but never tried it in practice.

The key in this case is "valueOpTimes". Poser supports:

valueOpDeltaAdd
valueOpPlus
valueOpMinus
valueOpTimes
valueOpDivideInto
valueOpDivideBy

As I understand it, only valueOpDeltaAdd  can take a deltaAddDelta parameter. I have never used the divide operators, but apparently you have to watch out for divide by zero errors.