The Progeny Graphical Installer (PGI) was an unsupported system for creating installers for the Debian GNU/Linux operating system. PGI is based on the installer used in the Progeny Linux Systems, Inc. distribution of Debian. Without customization, PGI produces a minimal Debian system installer on an ISO 9660 filesystem image suitable for burning to recordable CD or DVD media. With customization, PGI is a powerful, flexible foundation on which you may implement as sparse or as elaborate a Debian GNU/Linux installer as you like.
(Homepage http://hackers.progeny.com/pgi/guide.html is now CyberSquatted )