I'm brand new to the linux OS's and just installed CentOS 5.5 on my desktop. I'm trying to use YUM software updater but its not working. It keeps giving me an error for connecting to mirrors.I am an absolute newbie to this system and have no idea what I am doing. I am trying to install my linksys wireless network adapter, but before I can do that I need to run the updater to get software that is missing from my OS. Any help would be appreciated.

This is the code error that keeps coming up:

Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: mirrors.gigenet.com
 * c5-media:
 * updates: mirrors.gigenet.com
file:///media/CentOS/repodata/repomd.xml: [Errno 5] OSError: [Errno 2] No such file or directory: '/media/CentOS/repodata/repomd.xml'
Trying other mirror.
file:///media/cdrecorder/repodata/repomd.xml: [Errno 5] OSError: [Errno 2] No such file or directory: '/media/cdrecorder/repodata/repomd.xml'
Trying other mirror.
file:///media/cdrom/repodata/repomd.xml: [Errno 5] OSError: [Errno 2] No such file or directory: '/media/cdrom/repodata/repomd.xml'
Trying other mirror.
Error: Cannot retrieve repository metadata (repomd.xml) for repository: c5-media. Please verify its path and try again

I can't find any simple directions on how to do anything for CentOS 5.5 on the internet at all-the handbook didn't help either.