Using a screen keyboard with gnome-screensaver

[Jonathan <cl qgenuity com>]

Hi,

I'm using gnome as a part of the Ubuntu 9.1 netbook distribution. I would like 
to have a screen keyboard - any screen keyboard - pop up at the gnome 
screensaver password prompt. 

I've tried the recommendation from the FAQ here 
http://live.gnome.org/GnomeScreensaver/FrequentlyAskedQuestions

which says:
------------
Can I embed an on-screen keyboard for use with mobile devices?

Yes. A software keyboard that supports XEmbed should work. Here is one 
example:

1. Install libfakekey http://svn.o-hand.com/view/matchbox/trunk/libfakekey/
2. Install matchbox-keyboard http://projects.o-hand.com/matchbox/?p=1
3. set /apps/gnome-screensaver/embedded_keyboard_enable=TRUE
4.set /apps/gnome-screensaver/embedded_keyboard_command="matchbox-keyboard --xid" 

-----------

but it doesn't seem to work. Ubuntu uses gnome-screensaver 2.28.0, and the 
final two commands are entered using bash. 

Does anyone know if there is a current method for embedding an onscreen 
keyboard for use with the password prompt?

Thanks, 
- Jonathan