To add the Landscape HD channel stream, you need to do the following:
Download your channels/setting with DreamboxEdit to a folder
Manually add the following line to the bouquets.tv file using a text editor
Download the following attached LandscapeHD.tv file and put it in the same folder.
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Upload all the files to the satellite box with DreamboxEdit.
Reboot. Pick the Landscape HD in your channel list and play.
PLEASE NOTE: The stream isn't HD yet, but the LandscapeHD website says that is coming soon.