If you're looking to build a custom Linux disk image that's based on Ubuntu, Cubic makes it easy. Here's what you need to know.

This will create the new zip file in the current working directory. To unzip a compressed file, right-click it and select Extract Here (Figure 3). Figure 3: Unzipping a file the GUI way in Linux.

Here's how to roll your own Ubuntu Live CD, with all the packages you want, and some nice customizations, to boot.

Perhaps they referenced this guide to create a bootable Live USB on Windows, allowing them to test drive something like Ubuntu without making any changes to their PC.