As a Senior Technology Consultant, I must stay current on a wide range of different technologies, including the multitude of operating systems on the market. Just to keep up with Microsoft, I need to run Windows 95, 98, NT4, 2000, XP, Vista, Server (2000, 2003, 2008), and other permutations of the Windows operating system. I could keep about ten spare computers on hand for testing or purchase additional hardware, such as swappable hard drive bays, but that is obviously unwieldy. Equipment costs can also run up the expense of testing Windows clustering. To save money and run all these operating systems and clusters, I looked into VMware Workstation. In case you've never heard of VMware, it is software that lets you run virtual machines within an installed operating system; you can run Windows Vista and boot to a Windows 2008 domain controller in a separate window. You can even boot non-Windows operating systems, such as Linux and FreeBSD. The VMware technology is great, and I now use it extensively. Fortunately, the setup is fairly straightforward.
If you are interested in this tutorial, click, "How do I create virtual machines for testing in VMware Workstation 6?"
Please check out the discussion on what you love about VMware Workstation.