Civ III and Computers

Trying to install Civ III on my computer -- it doesn't like the idea, because the hard drive is rather full. So, I go to look for Large Files I Never Use. And I find the System files for (what I guess is) the failed install of OS X I did a couple of years ago (It was strange -- I had it running for a week or so, it crashed and refused to run OS X -- I eventually reinstalled OS X because the old OS 9 was still running,so I still had all my files. Computers are weird.)
Now, the old System files take up nearly a gig of memory on my hard drive. And I am 90%+ certain that's what I am looking at, considering it was in a folder called Previous System and I can locate the Suystem Folders for OS X and OS 9 as separate from this folder. However, my inner computer geek is telling me that if it says System on it, deleting it means bad things happen to Mr. Computer.

(no subject)

Who here is surprised? Honestly?

Okay, I lied and said that I played D&D on Friday nights, but only because watching anime wasn't a choice!