CentOS 5.4 64bit Live DVD can be used only with 64bit machine. CentOS-5.4 is based on the upstream release EL 5.4.0, and includes
packages from all variants including Server and Client. All upstream
repositories have been combined into one, to make it easier for end
users to work with. And the option to further enable external
repositories at install time is now available in the installer.

About CentOS

CentOS is an Enterprise-class Linux Distribution derived from sources freely provided to the public by a prominent North American Enterprise Linux vendor. CentOS conforms fully with the upstream vendors redistribution policy and aims to be 100% binary compatible. (CentOS mainly changes packages to remove upstream vendor branding and artwork.) CentOS is free.

CentOS is developed by a small but growing team of core developers. In turn the core developers are supported by an active user community including system administrators, network administrators, enterprise users, managers, core Linux contributors and Linux enthusiasts from around the world.

CentOS has numerous advantages over some of the other clone projects including: an active and growing user community, quickly rebuilt, tested, and QA'ed errata packages, an extensive mirror network, developers who are contactable and responsive, multiple free support avenues including IRC Chat, Mailing Lists, Forums, a dynamic FAQ. Commercial support is offered via a number of vendors.