I don't know if it help but if ever I invoke SUSEconfig (Even as su) I get command not found
1) enter the full path to the executable, and it should run (especially if you su to root first).
2) export PATH=$PATH:/sbin/SuSEconfig
to add the path to the executable to your user or root path ( if you execute the command as user, it's added to user's path. If you execute the command as root, it's added to root's path).