...this method is a little roundabout, and I'm sure there's some lag, but here it goes. First, put a laptop on your robot and have it communicating with the robot via crossover cable (?). Make sure that just wired connection is set up right (you know; like you would normally communicate with the robot without wifi). Install a remote desktop connection program on the laptop (my favourite is
Chrome Remote Desktop). Then simply remote desktop connect to the laptop from any other computer and drive it. I'm not certain but I would prepare for a bit of lag...
[edit] sorry this isn't really what you asked for :P