I have recently installed SL 6.0 in a laptop. 

I noticed that the gnome-control-center application is 
installed by default (also if it have to be enabled in the main menu 
or start by command line) but it is not running. 

The problem is that the main binary executable 
/usr/bin/gnome-control-center is not present in 
the installation and seems missing from the related rpm
(control-center). I suppose that this error is specific 
of SL 6.0 and not present in the upstream RHEL60 distribution. 

Probably a corrected control-center rpm package can be easily 
build and put in the SL repository.