This is my first attempt at a contribution to our community so bear with me.
X3 Terran conflict by itself is one of the most deep and engaging single player games out there. Xtended Terran Conflict takes what was great about X3 Terran conflict and adds new depth to the overall mix. The mod includes a number of features including a new dynamic galaxy to explore, new ships to pilot, and improved AI to name a few. The link below will take you to the post in Egosoft's forum where you can read about the mods features and where it can be downloaded.
http://forum.egosoft.com/viewtopic.php?t=293490
Here's a trailer demonstrating the mod.
Enjoy
