Thanks for fixing the "Create New Folder" problem and for fstab solution for partition mounting.
Lubuntu (and you) did a great job. However, one major weaknesses of the Lubuntu desktop is the lack of shortcuts. For new people, it is a turn off and important feature lacking. Could Pcmanfm offer a right-click menu option to at least create a symlink for files, folders, and applications (usr/share/applications: restricted folder, may need to create on desktop) either in same folder or, if not possible, in desktop folder by default (they could drag them wherever they want from there).
Other than this, I think that Lubuntu is very user friendly and usable, even for new people...