Launchpad has changed the URLs of PPAs. The new URLs for the Ubuntu-Rescue-Remix PPA packages are:

Jaunty
deb http://ppa.launchpad.net/arzajac/ppa/ubuntu jaunty main
deb-src http://ppa.launchpad.net/arzajac/ppa/ubuntu jaunty main

Intrepid
deb http://ppa.launchpad.net/arzajac/ppa/ubuntu intrepid main
deb-src http://ppa.launchpad.net/arzajac/ppa/ubuntu intrepid main

Hardy
deb http://ppa.launchpad.net/arzajac/ppa/ubuntu hardy main
deb-src http://ppa.launchpad.net/arzajac/ppa/ubuntu hardy main

Gutsy

deb http://ppa.launchpad.net/arzajac/ppa/ubuntu gutsy main
deb-src http://ppa.launchpad.net/arzajac/ppa/ubuntu gutsy main