Mandrake/Redhat provides a great RPM based equivalent to apt-get called urpmi.
"out of the box" urpmi only knows about the contents of the CD's you used to install Mandrake from, and unfortunately in order to see more PowerPack editions Mandrake doesn't tell you that there is another way to get the same thing and MORE!
So go here:
http://www.zebulon.org.uk/urpmi_en.html
http://www.zebulon.org.uk/
and follow the directions for setting up upmi.
Then ALWAYS use urpmi FIRST when you want a new package, as it will keep things consistent.
Once you have set up the sources as indicated you can also go to the "Install Software" gui to browse and install the myriad of packages available to you.
urpmi will automatically install and deal with any dependancies and package requirements.
BTW:
urpmi nfs
will suffice, also going into MCC.