If you are doing a lot of testing of different versions of Linux you typically download the LiveCD images of each one so you can “try it before you buy it”, so to speak. The problem is that you have to either burn them to disc or use an emulation platform like VMWare or VirtualBox. If you don’t want to bother setting all that up, you can use the simple MobaLiveCD application to run the LiveCD in a window, powered by the Qemu layer.