How do I create a COM5 port in XP?

Windows XP Pro. How do I create a COM5 port? This is on an IBM 4835-xx3 kiosk and the infrared touchscreen needs COM5 for the driver to attach to. Right now after a fresh install of XP and the various kiosk related drivers there is only COM1 and COM2, plus LPT1.

Thanks!
David