How to clone a VirtualBox VM

It seems it's not possible to clone a VM, but it is possible to clone a disk image. You just have to create a new VM which uses that image, which is pretty simple.

To clone the image that's located at d:\Virtual Machines\VirtualBox\WindowsXP\WindowsXP.vdi to d:\Virtual Machines\VirtualBox\WinXPVS2005\WinXPVS2005.vdi use the vboxmanage tool with the clonedvi command:

D:\Virtual Machines\VirtualBox>"c:\Program Files\innotek VirtualBox"\VBoxManage clonevdi "d:\Virtual Machines\VirtualBox\WindowsXP\WindowsXP.vdi" "d:\Virtual Machines\VirtualBox\WinXPVS2005"\WinXPVS2005.vdi
VirtualBox Command Line Management Interface Version 1.5.4
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D:\Virtual Machines\VirtualBox>