a few hints:
If your is a conventional hard disk (rotational disk, not SSD) consider that the first part of the hard disk is faster (up to 2x) then the last part of the disk, therefore I would suggest to install the OS first, and setup a large partition for other use at the end.
/media is a directory generally used to mount removable media, like external USB disk, USB stick and so on, therefore it's not advisable to use it for installed hard drive partitions.
Use 'mylivecd' to remaster your own working PCLinuxOS, you will have an 'installable backup' of your working system available on a DVD. At any time you will be able to reinstall from your own remaster. I have used this method to substitute my hard disks. You will only loose some HW settings (audio, video, network) because this is a feature that allow to reinstall on different hardware, but you will be able to configure again that HW in minutes.
You may want something like:
a '/' partition say 30 Gb, only for PCLinuxOS
a swap partition lager than the current available RAM, if you plan to use 'suspend to disk' feature
a /home partition for your own settings
one or more /data partition for your own data (like photos, music, movie ....)
some free space (unallocated/unpartitioned) for future use
The reason of the above is that you will be able to remaster your system (including '/' and '/home') to have all your personal settings, excluding large data partition(s), that you will backup separately.