In order to create mods for Darkstar One you will need some tools. A compilation of the official modding tools has been released by Ascaron.
Since version 1.2 DSO has modding support, so make sure you get the latest updates of the game first before you start modding.
You can find the modding tools <a href="http://www.swat-portal.com/php/wbboard/portal_database.php?action=view&id=8&sid=2cbc0536e91d747c73856f28abe9eb51">
HERE</a>.