I am the owner of Webb HTPC
https://sourceforge.net/projects/webbhtpc/
I recently forked from Element OS. We use the slim login manager and a modified version of xfce. One of the problems with this setup is that with the ubiquity installer the autologin setting does nothing. Now I can write a script to fix this but I need it to execute from within Ubiquity after the user picks there username. I also need to disable autologin should they choose not use it as my default boot up logs users in under the username webb for the live cd. I am currently digging through the python code but some guidance would help.
I also need to figure out why pulseaudio comes up muted by default in my distro and correct that.