There's nothing wrong with running Windows on your OS X machine: all you need is Boot Camp, right? Wrong. There's a better way: virtualization software, such as the Parallels Desktop for Mac or VMware's Fusion. If you run virtualization software, you can run Windows operating systems like XP and Vista inside of OS X. Features like "Coherence" or "Unity Mode" even let you run a Windows application as if it were just another OS X app. But which software should you choose? In this tutorial, CNET's Tom Merritt answers the great VMWare vs. Parallels question. Which is best for running Windows applications inside of OS X? Watch and find out!