The following instructions decribe the process for installing Knoppix Linux on a USB flash drive. This allows the OS to be booted directly from the flash drive. The instructions have been tested to work on Dell Optiplex GX270 and GX280s.
These instuctions are designed to be performed from a Windows PC.
The Knoppix Live CD is about 700MB, so you'll need a flash drive that is at least that big. In this example I used a 1GB Sandisk Cruzer Mini.
Begin by downloading the Knoppix ISO file from www.knoppix.org. You'll need v4.0 or newer. I used KNOPPIX_V4.0.2CD-2005-09-23-EN.iso
Next download Syslinux from http://syslinux.zytor.com/index.php. These instructions used syslinux-3.11.zip.