Linux - Create ISO from CD/DVD

I needed to setup a VM, and VirtualBox was complaining that it was sticking when running direct from the disk.

I therefore found the following:

cd /disk1
dd if=/dev/cdrom of=WindowsXP.iso

Where /disk1 is where you want the ISO to be created, /dev/cdrom is your CD Drive, and WindowsXP.iso is the ISO name you require