If you are running an older version of ubuntu, or some other debian distribution, you can create a lucid lynx root file system like this
First install the debootstrap package (it should include the settings file for lucid lynx)
1. download it from http://packages.ubuntu.com/intrepid-backports/all/debootstrap/download
2. install it with sudo dpkg -i NAME_OF_PACKAGE
Create the root filesystem (on a mounted partition, that you have prepared, here I just mkdir a place)
3. mkdir ~/lucid
4. sudo debootstrap --variant=buildd --arch i386 lucid ~/lucid http://archive.ubuntu.com/ubuntu/
Debootstrap copies the /etc/passwd so you can login, but it doesn't copy over the network settings or other servers, so make sure that they are correct before starting a machine with the new root file system.