Ignore Gorgon and get this:
http://forum.worldofplayers.de/forum/showt...d.php?p=8871228
It's 880 MB, but it's worth it. Not only will you get an insane performance increase, the badly broken combat actually works now. But be warned: if you're used to games like Star Wars: Knights of the Old Republic or equivalent, this game is not for you. There's no hand-holding, you WILL die a horrible death a hundred times and you WILL fail quests. Yes, it's actually possible to fail stuff in the Gothic games, unlike anything produced in the US for the last ten years. It's a very difficult game.
But if you enjoy a living, breathing, absolutely massive world with no loading times, lots of combat, quests, treasures and three different story lines (you can only finish one per playthrough), you'll have a blast. I am currently replaying Gothic 3 with the community patch 1.7 and it's a great game now. Just make sure you turn on the Alternative balancing and the new AI and you're set to go.
Too bad I binned the game in disgust. Would have liked to try a playable version.