Repository List for Jaunty Jackalope

Here is the content sources.list through which you can install any necessary applications. So delete the whole content of your sources list and replace it with the this content (below).
Save it. Go to the Terminal and type:

sudo apt-get update
sudo apt-get upgrade

# Repository List based on standard Jaunty with many extra packages
#
# If you get errors about missing keys, lookup the key in this file
# and run these commands (replace KEY with the key number):
#
# sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com KEY

# Ubuntu supported packages
deb http://archive.ubuntu.com/ubuntu jaunty main restricted multiverse universe
deb http://archive.ubuntu.com/ubuntu jaunty-backports main restricted universe multiverse
deb http://archive.ubuntu.com/ubuntu jaunty-updates main restricted multiverse universe
deb http://security.ubuntu.com/ubuntu jaunty-security main restricted universe multiverse
deb http://security.ubuntu.com/ubuntu jaunty-proposed main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu jaunty main restricted multiverse universe
deb-src http://archive.ubuntu.com/ubuntu jaunty-backports main restricted universe multiverse
deb-src http://archive.ubuntu.com/ubuntu jaunty-updates main restricted multiverse universe
deb-src http://security.ubuntu.com/ubuntu jaunty-security main restricted universe multiverse
deb-src http://security.ubuntu.com/ubuntu jaunty-proposed main restricted universe multiverse

#Canonical Commercial Repository
deb http://archive.canonical.com/ubuntu jaunty partner
deb http://archive.canonical.com/ubuntu jaunty-backports partner
deb http://archive.canonical.com/ubuntu jaunty-updates partner
deb http://archive.canonical.com/ubuntu jaunty-security partner
deb http://archive.canonical.com/ubuntu jaunty-proposed partner
deb-src http://archive.canonical.com/ubuntu jaunty partner
deb-src http://archive.canonical.com/ubuntu jaunty-backports partner
deb-src http://archive.canonical.com/ubuntu jaunty-updates partner
deb-src http://archive.canonical.com/ubuntu jaunty-security partner
deb-src http://archive.canonical.com/ubuntu jaunty-proposed partner

#gnome-globalmenu
# sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 7889D725DA6DEEAA
deb http://ppa.launchpad.net/globalmenu-team/ppa/ubuntu jaunty main

#chromium-browser
# sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 5A9BF3BB4E5E17B5
deb http://ppa.launchpad.net/chromium-daily/ppa/ubuntu jaunty main

#opera
# sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 033431536A423791
deb http://deb.opera.com/opera/ lenny non-free

#skype
deb http://download.skype.com/linux/repos/debian stable non-free

#firefox
# sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 632D16BB0C713DA6
deb http://ppa.launchpad.net/fta/ppa/ubuntu jaunty main

#gnome-do
# sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 28A8205077558DD0
deb http://ppa.launchpad.net/do-core/ppa/ubuntu jaunty main

#compiz-fusion
# sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 2ED6BB6042C24D89
deb http://ppa.launchpad.net/compiz/ubuntu jaunty main

#google
# sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com A040830F7FAC5991
deb http://dl.google.com/linux/deb/ stable non-free

#shutter
deb http://ppa.launchpad.net/shutter/ppa/ubuntu jaunty main

#medibuntu
# sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 2EBC26B60C5A2783
deb http://packages.medibuntu.org/ jaunty free non-free
deb-src http://packages.medibuntu.org/ jaunty free non-free

# MySQL Workbench
deb ftp://ftp.mysql.com/pub/mysql/download/gui-tools/ubuntu/ binary/
deb-src ftp://ftp.mysql.com/pub/mysql/download/gui-tools/ubuntu/ source/

# Virtualbox
# sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com DCF9F87B6DFBCBAE
deb http://download.virtualbox.org/virtualbox/debian jaunty non-free

# PlayOnLinux
# sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com FC6D7D9D009ED615
deb http://deb.playonlinux.com/ jaunty main

# Ubuntu tweak
# sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 6AF0E1940624A220
deb http://ppa.launchpad.net/tualatrix/ubuntu jaunty main
deb-src http://ppa.launchpad.net/tualatrix/ubuntu jaunty main

# disper tool multiple graphical displays
# sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 66D5C734F6EFB904
deb http://ppa.launchpad.net/wvengen/ppa/ubuntu jaunty main
deb-src http://ppa.launchpad.net/wvengen/ppa/ubuntu jaunty main

#nautilus-dropbox
deb http://linux.getdropbox.com/ubuntu jaunty main

#Drizzle
deb http://ppa.launchpad.net/drizzle-developers/ppa/ubuntu jaunty main
deb-src http://ppa.launchpad.net/drizzle-developers/ppa/ubuntu jaunty main

#subversion 1.6
# sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 6298AD34413576CB
deb http://ppa.launchpad.net/anders-kaseorg/subversion-1.6/ubuntu jaunty main
deb-src http://ppa.launchpad.net/anders-kaseorg/subversion-1.6/ubuntu jaunty main

#pidgin
# sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 7FB8BEE0A1F196A8
deb http://ppa.launchpad.net/pidgin-developers/ppa/ubuntu jaunty main

#wine
# sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 58403026387EE263
deb http://wine.budgetdedicated.com/apt jaunty main

#gnome-colors theme
# sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com 2D79F61BE8D31A30
deb http://ppa.launchpad.net/gnome-colors-packagers/ppa/ubuntu jaunty main
deb-src http://ppa.launchpad.net/gnome-colors-packagers/ppa/ubuntu jaunty main

#vlc 1
# sudo apt-key adv --recv-keys --keyserver keyserver.ubuntu.com D739676F7613768D
deb http://ppa.launchpad.net/c-korn/vlc/ubuntu jaunty main