At 322MB, OpenVistA VivitA FOIA Gold (available at http://sourceforge.net/projects/worldvista) is the smallest, lightest, live CD ever made of VistA.
It a remastered version of Damn Small Linux (DSL – http://damnsmalllinux.org) version 2.0RC1 upgraded to current versions of packages, Debian package management enabled, and wine (http://winehq.org) – & Xdialog (http://xdialog.dyns.net) installed. DSL is the most compact Linux live CD, with with the VistA release dated August 25, 2005 as released by the US Department of Veterans Affairs (VA – http://www.va.gov) ) under the Freedom of Information Act on GT.M (V5.0-000, as released under the terms of the GNU General Public License – http://www.fsf.org/licensing/licenses/gpl.txt – at Source Forge – http://sourceforge.net/projects/sanchez-gtm).