1) You will also need to install the Harmony software on your computer. You don't need the Harmony remote to be connected to the computer to configure or change its setup. It's only needed when your click "Update Remote". So you can make or change the configuration at your end, logoff, then ask him to login to update the remote at is end.

2) Yes, the Wizard will select a default Input Method. It will select the discrete method (Method 2), if the device is deemed to support discrete input commands.

3) Yes, you can change the input method to use Method 2, but first check if the dataset list discrete input commands, and test them in device mode. Else, you will have to hunt for them and submit them to Harmony support.