Provavelmente você está procurando pelo Sabayon :
Sabayon is a system administration tool to define and deploy desktop profiles for the GNOME desktop environment. It allows you to control such things as panel layouts, menu items, default gconf settings, as well as provide pre-defined defaults for some non-GNOME programs such as Firefox. It also makes use of the lockdown functionality of Pessulus. It does this by providing a "desktop within a window", allowing you to customize your desktop as you see fit, then recording your changes, to be applied to users by the sabayon-apply program at login time.
Veja também este artigo: Linux Kiosk: um cenário de bloqueio do Ubuntu / Gnome .