Creating multiple virtual machines by cloning

You spent half a day installing your Ubuntu virtual machine, updating and installing all the required software… Finally life starts to make sense…

Suddenly, your boss bursts into your office and starts screaming: "I need you to test two content management systems to see which one we are going to use on our company's web!"

So now you have to test two completely independent applications, and you have only one virtual machine to test them on! You could spend the rest of the day installing, updating, and configuring another Ubuntu virtual machine, or you could just copy the hard drive image from the Ubuntu virtual machine you've just finished configuring, create another Ubuntu virtual machine, and attach that hard drive image so you can avoid the hassle of installing Ubuntu from scratch!

But there's a little problem: VirtualBox assigns a unique identity number (UUID) to each hard drive image, and if you try to use two identical disk images on the same...