Here is a pose file that will scale V3 (and similar figures) up to 150%, whilst keeping the scale dial set 100.000. I expect it will work on some other DAZ figures, but not ones of V2 vintage. It works by slaving the 'scale' channel in the BODY to the PBMCC_25 channel. There is a slight possibility that some morphs you want to inject also want to use this channel (a 1 in 25 chance I guess).

I you want to use conforming clothing on this figure you will have to 'Set Figure Parent' of the conformer to be the Body of the character BEFORE you conform it.

save the text below to a pose folder as "V3_ScaleUp.pz2".

{
//V3_ScaleUp.pz2 by Les Bentley, 11/April/2008.
//Scales V3 (and similar figures) to 150%.
version
        {
        number 3
        }

actor BODY
        {
        channels
                {
                valueParm PBMCC_25
                        {
                        name sCaleUp
                        initValue 0.498000
                        hidden 1
                        forceLimits 4
                        min 0.498000
                        max 0.498000
                        trackingScale 0.001
                        keys
                                {
                                static  0
                                k  0  0.498000
                                }
                        interpStyleLocked 0
                        }
                propagatingScale scale
                        {
                        valueOpDeltaAdd
                                Figure
                                BODY
                                sCaleUp
                        deltaAddDelta 1.000000
                        }
                }
        }
figure
        {

        }
}