The dock.challenge.gbx file you have requested: Maps Levels Missions / Tracks / Bay / Dock - 6.41kb is not available. Perhaps try browsing all files for the game TrackMania: Sunrise and upload any files you want to share or are missing. This is the only information we could locate:
For more information on TrackMania Sunrise, visit Trackmania.filefront.com This is a very easy stunt race. You can get 600-800 points with spins and jumps.