cannot disable metacity shortcuts

Some time ago Rene Rask wrote:
 > Sorry, I didn't get spend much time on anything else than trying to fix
 > the metacity issue. I don't run Null on my workstation since I can't do
 > anything useful with it (I have an old workstation with Null to test any
 > changes to metacity)

Sawfish is included in (null) as well, but it's a hassle to switch.  
Here's how I did it:

1. run gnome-session-properties

2. click the "current session" tab

3. select your curently running window manager (metacity) from the list

4. click the "remove" button

WARNING! Don't click the "apply" button yet or you will loose your 
currently running window manager, crash Gnome panel, and/or lose input 
focus to _all_ open windows.

5. open an xterm and run:

sleep 10; nohup /usr/bin/sawfish 1>/dev/null &

You now have 10 seconds to click the "apply" button in 
gnome-session-properties. If you're lucky your currently running window 
manager will die, Gnome panel will crash, and your new window manager 
will start up in 10 seconds.

6. run gnome-session-save

TC