Instructions
Click the "x" button on your controller to choose a title that you want to add to your Instant Queue. You can navigate the Netflix interface with the joystick or d-pad, going up or down to switch between sections and left or right to view the titles in one section.
Go down to the option "Add to Instant Queue" on the panel that comes up on the right. This panel will also show the options to play your video and rate it.
Click the "X" button to toggle the video's status in your queue. It may take a few seconds for the video to show up in your queue. If a video is already in your Instant Queue, this option will read "Remove from Instant Queue."