This paper explores how a KVM virtual machine booted with a Knoppix Live DVD can provide a simple and reliable system for sharing demonstrations of JPF, and in particular, for running regression tests in a repeatable way before changes are committed to shared repositories. To make the system easy to automate, we integrated host file system access and a server for script execution. To make it practical for an interactive workow, checkpointing was added to avoid booting and configuration delays. As an unexpected benefit, the isolation provided by the virtual machines allows multiple tests to run in parallel without risk of clashes over resources such as server ports.