VirtualBox/Technical
[wikipedia:VirtualBox|VirtualBox]] is an x86 virtualization system available as either GPL or commercial software. It runs on either Win32, Intel Mac or Linux host machines, allowing you to run Sugar images within the virtual machine. The following instructions are mostly for VirtualBox OSE (Open Source Edition), which is available in packages in many Linux distributions. You can also download it and its documentation from the VirtualBox.org Web site.
QEMU image conversion
You can also convert .img image files from QEMU formats, such as qcow2, to vmdk format, which VirtualBox can open. The qemu-img command usually detects the source image format automatically.
$ qemu-img convert -O vmdk file.img file.vmdk