The dustland.zip file you have requested: Skins / Miscellaneous / Helicopter Dust Landing Effect - 186.32kb is not available. Perhaps try browsing all files for the game Flight Simulator X and upload any files you want to share or are missing. This is the only information we could locate:
For more information on Flight Simulator X, visit Flightsim.filefront.com This is an improved rotor wash cloud intended for use in the desert. It should be noted that it looks a little silly everywhere else.