Unsure if there is a topic on this on aussiepinball but what you need is a NULL MODEM serial cable to interface between the machine and a pc. Then there is the software to transfer which can be downloaded from planters pinball. You can't update using a notebook unless it has a serial port. Most don't anymore and the USB serial port adapters don't seem to work.

The process is easy and if you need to make a cable, I think I have the pin configuration.