Mine

deb http://ftp.us.debian.org/debian/ lenny main contrib non-free
deb-src http://ftp.debian.org/debian/ lenny main
deb http://security.debian.org/ lenny/updates main
deb-src http://security.debian.org/ lenny/updates main
deb http://www.debian-multimedia.org lenny main
deb http://www.kiberpipa.org/~minmax/cinelerra/builds/athlonxp/ ./