If the subject of partitioning is new to you, I would recommend studying the instruction manual to the very end before attempting to install the program. With the availability of the Partition Wizard this would seem to be overkill. Not really, because the program is full of possibilities that you will not be able to realize unless you do understand what is being discussed. Entrance into this door should be done with your eyes wide open, gathering information very carefully. While the information available is as good as it gets, you must heed every caution seriously, because it is possible to lose your files by ill-considered actions.
Enough danger signs on with the program.
As indicated, you must prepare a boot disk, and back up all your data files. The inference is that it isn't necessary to back up the whole program in the interests of brevity. Programs of this nature have been around for awhile, but more important today than ever. The cake has gotten bigger and thicker, so we have to learn how to cut it up safely and efficiently. Partition Commander and System Commander do exactly this.