Seems like the best way to learn the tech editor would be to look at one or more of the standard race tech trees in the editor. But I can't figure out how to open (eg) the Terran tech tree. When I hit Ctrl+O from the tech editor screen, I see Documents/My Games/, which does not contain any .xml files. Basically it's an empty folder. Searching for .xml files, I can't find any that look like tech trees anywhere in the GC2 directories. How does one go about editing the game's existing tech trees? (Also, how do you open and edit existing ship components, etc?)