As a printer manager you can use konqueror. It has a printers section near the devices tab (or close
).
As for the redhat-config-<stuff> you will hardly need them often. They are mostly system administration tools. You use them once or twice an that's it (unless you are always changing active services or network interfaces or keyboad layouts). Anyway KControl starts to have replacements for those tools. Look in the system section of KControl