"Right" way to update KDE

Well, I have been doing well untill now. The file
cups-1.1.10-0.rh7x.1.i386.rpm will not install because in "conflicts with
LPRng."

<newbieAssumptions>
1. LPR is a print service and cups is a print service. I guess they cannot
happily live together.
2. So, whomever put this group of KDE 2.2.1 packages together uses cups. My
system defaulted to LPR, evidently, because I don't remember specifying what
print service I wanted.
</newbieAssumptions>

Questions:
- Can I use these RPMs if they are "based" on cups?
- Some of the other RPMs are dependent on the cups RPMs. How do I install
the cups RPM when I am already running LPR?
- Are all my above assumptions and questions wrong and I don't understand
something?

Alan