If you've been experimenting with different operating systems for a while, or you have some need to run more than one OS on a particular desktop machine, chances are you've been playing around with Oracle Virtualbox due to its ease of use, popular set of features, flexibility, and cost. You've also probably run into the following syndrome (usually while trying to build a new virtual machine):

• You configure a new virtual machine.
  
• You associate a bootable optical disk image with the new VM (for the sake of argument, let's say you're experimenting with the 50 megabyte(!) distro Damn Small Linux …