How do I increase the compiz shadow radius above 18 in Unity 2D 12.04?

view full story

http://askubuntu.com – In < 11.10 this can be done from gconf-editor, but that doesn't seem to work in 12.04. The metacity-theme.xml file also set the active shadow much larger than 18, but no effect. So anyone know how? Thx. (HowTos)