N00b question about FFXI installation descriptionFollow

Thanks in advance for helping someone whose computer knowledge is iffy.

So, my hard drive is full enough that I want to clear some space before TAU releases later this week. In the "Change or Remove Programs" section on my Windows computer, I see FFXI installed and listed in the following way, which looks a little odd to me:

FFXI 5.25 GB
FFXI Benchmark
FFXI: CoP 6.35 GB
FFXI: RoZ

The benchmark and RoZ have no sizes listed, which makes sense because I assume they fall under FFXI. However, FFXI and FFXI:CoP both list what looks like the full program size.

My question: Have I somehow managed to install FFXI twice on my computer (presumably the second time when I got CoP or did a re-install sometime afterwards), or is this simply how the programs represent themselves on this screen, with CoP bigger than FFXI because it includes FFXI?

Basically, I want to know if removing the "FFXI" 5.25GB file will save me 5.25GB or simply erase 4/5 of Final Fantasy and wreck the game installation.

As a secondary question, I cannot uninstall the benchmark from this screen (it starts loading install wizard but never opens it). Is there another way to remove the bench?

Edited, Sat Apr 15 17:34:20 2006 by Caesura