Yeah, basically you install VirtualBox. Once you install Virtualbox, you install a different Operating system into the virtualbox. The virtualbox basically tricks the operating system into thinking it's on a full machine (the virtualbox has a bios, etc). So basically, you install VirtualBox, then you install XP in a virtualbox window (so you have a windows 7 window... inside that window is XP). Then you can run "incompatible" programs in XP in the window.