I have an old HDD image file that was used with Parallels Desktop 3. Ideally I'd like to use it in VirtualBox (conversion).

In all the tutorials I found (like this one or that one) the VM must be started: there's the problem. I don't have the machine where Parallel 3 was installed anymore. I tried installing the trial version of the last version of Parallels (9) but it seem it doesn't offer the possibility to import an old VM.

So here's the question: Given I can't boot the VM with Parallels Desktop, is there a way to convert the image file to another format that is bootable in VirtualBox?

If it changes anything, the host is MacOS X 10.9, the guest is Windows XP.