[url]http://fogproject.org/wiki/index.php?title=Installation_on_CentOS_5.3[/url]
I have FOG running on 28 or so CentOS boxes, all are CentOS 5.7 with one exception being CentOS 6.2. They are all very reliable boxes, only issues with install was getting rights correctly set and the hidden .mntcheck file in there. These are by no means server grade machines either they are re-purposed desktops.