So to test octoxbps, should just need two simple steps.
1. Edit the text config file located at /etc/sv/agetty-autologin-tty1/conf and replace root with weedog
You can do the above from Rox or Thunar - just find that file and right click open with geany.
(or, in a terminal, enter command: geany /etc/sv/agetty-autologin-tty1/conf)
2. Now switch to weedog desktop via start menu:
Applications -> Log Out
press the big Logout button, which takes you to a terminal, and at the terminal simply type: exit
If you get asked for a password for weedog (can't remember if you do), I think it might simply be weedog.
Then your previously installed octoxbps should work allowing you to check it out.
Reverse above procedure to return to being logged in as user root. Em... except, once you have successfully reached desktop as user weedog say, you'd have to start filemanager as root user via (from a terminal commandline window):
sudo rox
or
sudo thunar
or simply use:
sudo geany /etc/sv/agetty-autologin-tty1/conf
prior to changing name weedog back to root; otherwise it won't save since weedog user doesn't have permissions to save into /etc area.
Just try it. It is simpler to do than to explain it. Just that one quick text edit involved.
Could likely be easily automated using sed in a script so from user point of view switch-user made just into another Start Menu (Applications) choice.