How do I associate a Vagrant project directory with an existing VirtualBox VM?

Question

For Vagrant 1.6.3 do the following:

1) In the directory where your Vagrantfile is located, run the command

VBoxManage list vms

You will have something like this:

"virtualMachine" {xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}

2) Go to the following path:

cd .vagrant/machines/default/virtualbox

3) Create a file called id with the ID of your VM xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx

4) Save the file and run vagrant up