How could all the GNOME keyboard shortcuts be removed in a script, in other words, NOT using gconf-editor?

I am developing custom software on a RHEL system, which tightly locks down every user on the system. I have implemented my own lock screen through dbus, user screen lock (Alt+L) through xbindkeys, and that's pretty much all I want them to be able to do. I have an installation script for root to perform but for now, unfortunately, for every user root creates he has to go to gconf-editor or through the System->Keyboard Shortcuts->Disable, Disable, Disable,... sequence. Is there a way to run a command to remove all keyboard mappings for a user? Maybe through gconftool-2?