Interesting! Thank you. And why do you replace its wm with fvwm?
My fvwm configuration was developed for over 7 years. I find it much easier to use than any other WM out there.
In fact I started using xfce not so long time ago (few months), just to have all the features of desktop environment.
Basically xfce is extension for my fvwm config and not the other way around