Road Hog 4 External Touch screen driver

Hi,
I'm abount to ad an external touch screen monitor to my RH4.

Do these instructions still apply:

**Note: In order to use an external monitor on the Road Hog, you will need the USB to VGA adaptor or do I need to plug in the VGA to the VGA port and STILL the USB for the touch screen driver and functionality?

How do I get the driver into the RH4? Download for www, put on USB flash and what?