Howtofogr published a guide about installing Xen on an Ubuntu 7.10 Server

This tutorial provides step-by-step instructions on how to install Xen on an Ubuntu Gutsy Gibbon (Ubuntu 7.10) server system (i386). You can find all the software used here in the Ubuntu repositories, so no external files or compilation are needed.

Installing Xen On An Ubuntu 7.10 Server From The Ubuntu Repositories