Debian 5.03 xfce+lxde i386 CD
Debian uses codes for system architectures, at the official install images noted as amd64 and i386 the user can select LXDE in the menu marked "Advanced options".

About Debian

Debian is a free operating system (OS) for your computer. An operating system is the set of basic programs and utilities that make your computer run. Debian uses the Linux kernel (the core of an operating system), but most of the basic OS tools come from the GNU project; hence the name GNU/Linux. Above all it provides more than a pure OS: it comes with over 25000 packages, precompiled software bundled up in a nice format for easy installation on your machine.