By the way,
now I am trying to make a package manager to import ArchLinux ones to Porteus ones.
Your FVWM drives me to study many things.
There are interrupts for updating my articles.
But I am continuing to follow to your FVWM.
And then I had to get many packages from ArchLinux.
My bad nature of interest on many things makes me enter mazes.
FVWM 2.6.5 source
Create directory, unpack both archives and script there, execute script and it should patch and compile fvwm to ./fvwm-compiled then it will create XZM module in ./
P.S. I just compiled it. Works fine on x86_64 and files have exactly the same size as in my old module. It lacks /usr/bin/startfvwm2 and /etc/X11/xinit/xinitrc.fvwm2 with symlink /etc/X11/xinit/xinitrc pointing at it
It should be easy to create i486 module with all patches. =)