This a response I got from a programmer at VSO when having copied and sent this to him:
"[ ] 10% Volume Increase
[ ] Double The Sound Level
[ ] Wow, this is loud !
[X] Extreme Volume, make the neighbours call the Police !":
yes, possible to do something like this.... at this moment, the sound
"normalizer" (which is in fact much than a simple sound normalization)
in copytodvd has a slide telling in dB (decibel) the average sound
pressure - light volume increase would be in -16 -12 dB range, to very
loud at -3 dB.
Simpler settings as described ought to be better !
so I guess we get to wait and see what will come out
Here is a good link to check out: http://www.vso-software.fr/divxtodvd/divxtodvd_todo_list.htm
It is the 'to do list' for DivxToDVD (programming wise)