Well, you asked what the patch did and I answered with all the information I had :-/

As for getting USB networking working, it's getting a bit off-topic for this thread but here goes anyway: install the maemo-pc-connectivity meta package (actually I think only pc-connectivity-manager and connection-switcher are really needed), use the "PC Connection" status bar applet to select "USB network", and set the IP address on the host side manually. The tablet side is 192.168.2.15/24 so any other 192.168.2.x address with netmask 255.255.255.0 will work on the other side. For Windows hosts you'll need to install the .inf first, but I'm afraid I can't help with anything past that.