be of any help?
Else you can try this one, but I'n not sure if it works, just build it now
Fedora uses a different setup. Instead of the dm-specific locations, it requires session files to be in /etc/X11/dm/Sessions. So, to get WM into session menu, create the file: /etc/X11/dm/Sessions/windowmaker.desktop and add this in it:
You may need to put the full path to WM in the "Exec" line if it is in a non-standard location. You can also give execution right to the file:
chmod +x /etc/X11/dm/Sessions/windowmaker.desktop
Like I said before, I'm not sure if this works or if it can work! Just try it out