EPM Default Login Basefile Edit

Hello, Using the Login restapp when you boot up a phone with no extension assigned to that MAC address it gets the default login page with “Login Int” and “Login Ext” which is fantastic. Works great. I would like to be able to edit this base file, is there a way to do it? My most pressing issue is the VLAN assignment I want it to take from the config but it would be nice if I could set the background image and have it do the firmware update on first boot rather than after logging in.

I am using yealink phones so if it doesn’t find a mac.cfg file it just takes the y00000028.cfg file.