Ubuntu is just about the worst Linux distro. available these days. Canonical who produce Ubuntu have become arrogant and ignored users needs however well voiced across the many Forums that make reference to Ubuntu. For example Ubuntu 11.10 doesn't offer the classic GNOME Desktop and it doesn't include the Synaptic Package Manager despite the fact many users did not want these changes. I used to have much time for Ubuntu starting with Ubuntu 6.10 finishing with the last decent release which was Ubuntu 10.04 LTS
Debian based distros. are the way forward and Linux Mint is the first of the mainstream distros. moving towards not using Ubuntu repository
http://blog.linuxmint.com/?p=1818
I thoroughly recommend Linux Mint Debian Edition Its easy to install and easy to use plus it comes with much of the software you are likely to need preinstalled.
Linux Mint Debian Edition Download
http://www.linuxmint.com/edition.php?id=88
Manual partitioning guide for Linux Mint Debian Edition
http://www.linuxbsdos.com/2010/12/28/manual-disk-partitioning-guide-for-linux-mint-debian-edition/
You download the ISO. image of Linux Mint Debian Edition then you need to create a Bootable LiveDVD
https://help.ubuntu.com/community/BurningIsoHowto
Linux Mint Debian Edition can also be run straight from the LiveDVD from Boot without touching your Hard Drive
LUg.