Q. I'm trying to install the AWMS and I get this error:
Please insert CentOS disc -99 to continue
What's the matter?
A. That message is a symptom of a bad/corrupt .iso. We recommend redownloading and/or reburning the .iso, and making sure that the md5sum of your download is identical to the md5sum posted on our download page.
Here's the CentOS bug that describes the symptom: http://bugs.centos.org/view.php?id=2099