fvwm port to RTP ?


I would like to ask something related with fvwm

XPhoton is ok a bit slow sometimes. Anyway I am using a lot fvwm for
Solaris, BSDs
There is a port of this window manager to RTP ? How difficult would be
to port something like this ?

I would like to have something really simple, more simple than Photon
right now, but I understood is not possible to change the way of the
windows, etc … in the current version.