Instant switching: compiz (gtk), emerald, metacity

In various places these are incorrectly listed. At least as of Intrepid Ibex, here's how to switch between window managers... still trying to figure this out...

metacity --replace
emerald --replace
compiz-decorator --replace
compiz  # to start things up for compiz

Oh, but when I try it out I'm getting some problems. In theory ... Just put each of these lines in a custom application launcher on your panel (and maybe put those in a single drawer)