VIRTUAL BOX: Creating a clone on the same host machine

Creating a clone on the same host machine

Execute this command:
"C:\Program
Files\Sun\xVM VirtualBox\VBoxManage.exe" clonevdi "Ubuntu 8.04.vdi"
"Ubuntu 8.04 clone.vdi"

Ref: http://srackham.wordpress.com/cloning-and-copying-virtualbox-virtual-machines/