"Linux Mint is an Ubuntu-based distribution whose goal is to
provide a more complete out-of-the-box experience by including
browser plugins, media codecs, support for DVD playback, Java and
other components. It is compatible with Ubuntu software
repositories. The 3.0 Xfce edition was released on August 7, 2007.
Some snapshots for Linux Mint can be found here, but these
snapshots are not specific for Xfce.
"The test machine that I am using is pretty old and well suited
for lightweight distributions like this..."