What you have said is probably exactly right, but I don't understand it. What should I do at this point?
Thanx for your i8nterest--doug
When you are in the installer and get to the partitioning section, choose
Custom disk partitioning.

At the next screen, click the
Toggle to expert mode button.

When the next screen opens, you may have to lengthen it to see all the buttons on the right.

Click on the partition you wish to use for / on the top bar. In this example with only two, I click the one labeled ROOT, then click the
Mount point button on the right.

Make sure the
Mount point box at the top indicates
/ and click the OK button at the bottom. Note that the partition bar no longer shows the label name, but now shows the selected mount point.

Repeat the process with the partition you want as /home on the PCLinuxOS installation, and make sure the
Mount point box indicates
/home as selected from the drop down menu.

In this case the above window indicates the same partition as used for /, because I only have that one partition to use for this demonstration. In your case you would have selected a different one, the important part being the correct mount point showing in the Mount point box before clicking the OK button.
When you've finished setting the mount points for / and /home, click the
Done button.
The next window would ask which partitions to format. If both partitions have previously been formatted and labeled, you would remove the checks for both. If neither has been previously formatted, you would make sure that both were checked, then proceed with the installation.