It goes great, Steve!
Child theme done and it works.
I only have a couple of small problems…
I modified the files spHeadDesktop.php and spGroupViewDesktop.php in the folder templates/desktop.
In the first one I changed the breadcrumbs by removing Home, in the second one I commented out the area Unread and recently updated topics.
The two modified files are in the child theme, but for some reason the system uses the two files from reboot so those things look just normal.
If I modify the files in reboot, it works but it will get back to normal when I upgrade the theme.
Any ideas?