I run fvwm on one workstation and bspwm on another. I would like to configure bspwm on the workstation running fvwm. I'm looking to avoid having to exit X and start a new session under bspwm just to verify configuration changes. How would I go about having a window of a bspwm session inside my main window manager session on the same machine? Could I use jails for this sort of application?