[CentOS] Headless system

So I'm in a bit of a pickle ... I have a machine that needs to be repurposed from WinXP to CentOS. I downloaded the CentOS DVD and all then realized ... I don't have a keyboard/mouse for the machine. It only has USB ports on it, and I don't have a single available USB keyboard that I can plug in. Bit of a problem.

Usually what I do is install via VNC anyway, but that is contingent on me already having something on the machine that allows me to connect to it so that when it boots up, I can edit the boot parameters and enable VNC. I don't have that this time.

So, the question is: can I make a DVD image that starts the installer with VNC options set and if so, how do I go about that?