mfelker wrote: Can't tell if you are replying to me.
Yes I was replying to your post as evident by the "(in response to mfelker)" on the reply! 
I only said to consider burning the ISO to an optical drive because on occasions that has helped some people even if not normally needed.
I stand firm by my comments on this issue!
BTW I still would like to know if you or anyibodyelse has succeeded to install CentOS from an ISO. Have you tried it??
I have no problem installing any Linux Distro from ISO Image including CentOS. Also regardless of how I download an ISO Image I always validate its checksum before using it. Checksums are published for very good and valid reasons!