GTX USB Loader for Wii - User Guide
Once you have launched GTX USB Loader you will be presented with an interface like so, which is referred to as the gui (graphical user interface).... although there will be no games listed if it is a fresh HDD.
It's obviously inspired by coverflow. Various views are available by pressing on the D pad. Here is a an example ...
Pressing B (Wiimotes 'trigger' button) will take you to the install/remove area
Once you have a few games on your hdd you can make a list of your favourites by marking your favourite games. To mark a game as a favourite select the game from the 'install/remove' page then change the favourite setting to 'yes'. Don't foget to save the setting after you change it by selecting the save option.
Now when you are in both the GUI view and list views you can toggle whether to display all games or just the games you marked as your favourite.