keybindings in XFCE4.2

[Greg Knaddison]

Howdy folks,

I have installed xfce4.2 on CentOS4 (essentially RHEL4) with the
precise versions given below.  I would like to change my keybindings,
specifically for "alt+tab" walk through windows functionality.  Can
anyone send me in the right direction?  I didn't find much on the
subject in my google search of this list archives and the internet at
large, but maybe I'm using the wrong keywords.

Thanks in advance,
Greg

[root at porter ~]# uname -a
Linux porter 2.6.9-5.0.5.EL #1 Tue Apr 19 23:50:27 BST 2005 i686 i686
i386 GNU/Linux
[root at porter ~]# cat /etc/redhat-release 
CentOS release 4.0 (Final)

packages installed matching *xfce*

YumInstalled.txt:libxfce4mcs.i386                         4.2.1-3     
          installed
YumInstalled.txt:libxfce4util.i386                        4.2.1-3     
          installed
YumInstalled.txt:libxfcegui4.i386                         4.2.1-4     
          installed
YumInstalled.txt:xfce-mcs-manager.i386                    4.2.1-3     
          installed
YumInstalled.txt:xfce-mcs-plugins.i386                    4.2.1-4     
          installed
YumInstalled.txt:xfce-utils.i386                          4.2.1-3     
          installed
YumInstalled.txt:xfce4-iconbox.i386                       4.2.1-3     
          installed
YumInstalled.txt:xfce4-panel.i386                         4.2.1.1-4   
          installed
YumInstalled.txt:xfce4-systray.i386                       4.2.1-4     
          installed

If I need them I can easily add:
YumAvailable.txt:libxfce4mcs-devel.i386                   4.2.1-3     
          extras
YumAvailable.txt:libxfce4util-devel.i386                  4.2.1-3     
          extras
YumAvailable.txt:libxfcegui4-devel.i386                   4.2.1-4     
          extras
YumAvailable.txt:xfce-mcs-manager-devel.i386              4.2.1-3     
          extras
YumAvailable.txt:xfce4-panel-devel.i386                   4.2.1.1-4   
          extras