The recommended approach for CentOS-6 is to use livecd-iso-to-disk from livecd-tools with DVD1. This has been tested with livecd-tools-13.4-1.el6 from EPEL. Thanks to forum user AndrewSerk for the recommendation in a forum post.
Building a distribution on a USB key as of CentOS 6.2 – thanks to Mark Roth for the CentOS-6 procedure, and to Yves Bellefeuille on the CentOS-Docs list for several additions and corrections. 继续阅读