Mojopac only carries all your installed programs and settings. What if you wanted your entire operating system with you? Virtualbox is an application that lets you do that. Once it's setup, it's almost as simple to use as Mojopac.

With Virtualbox, the entire install goes along with you. Virtualbox stores the entire dump of your operating system into a single file. Using Virtualbox, you aren't limited to Windows like Mojopac.

You can choose pretty much any operating system of your choice to install on it. You can have any number of operating systems on your portable drive.

Because the operating system is installed on a virtual computer, there isn't any change of hardware so you won't ever have any problems on any other desktop that you happen to access it from.