At first it will seem a little awkward since everyone no matter how experienced is still a "newbie" there. Have you downloaded and burned it to a cd-r? That will have to be done with a program that can burn iso disk images to cd-rs and make the disk bootable.
Fortunately sourceforge.net provides a page full of screen shots as well as a brief tutorial seen at
http://gparted.sourceforge.net/screenshots.php The visual references as well as the description here will help. Once you boot from the finished disk the entire process will be a little different between splash screens and the prompts that will keep coming up until you reach the main gui. At each use the defaults by simply pressing the enter key.
With any Linux distro or tools get used to seeing "HDa1" for the primary ide master's "C" partition. A second partition on the host drive would be "HDa2". On a second ide drive slaved "HDb1" for the primary there and so forth. Once you are at the main gui you will see the first if more then one ide being displayed.
The small button on the upper right has a dropdown menu showing all hard drives installed. For the single drive case like you may have there you then hightlight the partition detected and click on the remove button followed by clicking the apply button. A small window with a scrolling tab will then go back and forth there as the partition is removed.
To exit simply click on the red buttom at the bottom right and choose between reboot or eject disk+reboot to see the drive drawer open for you to remove the disk. Once you click the reboot button there the system restarts. If you are going to put another cd in that's a good time for that.