I have installed the VirtualBox OSE and fully installed XP SP2 (with all MS updates) as a machine before I realized that the OSE version doesn't support USB. I would like to upgrade or install VirtualBox to the proprietary version (with USB support), without having to fully reinstall the XP machine.

Is there an upgrade script? Or, can I just backup the VirtualBox folder in my Home Folder, install the proprietary VirtualBox version andthen restore the VirtualBox Folder to my Home Folder? Is there a better or preferred way to reach my objective?