[Alug] Debian: Configuring Gnome

Hello! I have installed Gnome from the official release CDROMs but I cannot get the standard desktop with The "foot" icon, bottom bar, panels etc. I get a custom "debian" background, and menus that appear when I right-click the desktop. There is a workspace icon in the top right-hand corner. Also I cannot change the window manager via Gnome control center, or find a way of adding items to the menus. I do not know whether the problem is in the window manager or the Gnome configuration. Does anyone know how I can install a clean "standard" version of Gnome? Regards Chris Lale