I just bought this as I've always heard how good it is, but while checking the screenshots on mobygames.com I saw mention of the Eurpoean version somehow having different content, with some uncensored bits and an In Extremo concert. Not that any of that is somehow critical to the gameplay, but I will admit to being a fan of both In Extremo and pixelated naughtiness, and besides, I detest seeing things watered down for my supposedly tender American sensibilities.
Here's a shot
http://www.mobygames.com/game/windows/gothic/screenshots/gameShotId,162057/

Due to royalties & copyright reasons, the In Extremo concert only exists in the German version.
I'm not sure regarding the censure (women scenes & posters), but it may be for all non German version too.
The live is avaible outside gothic:
http://www.worldofgothic.de/index.php?go=shop_inextremo
Buying the german version is still possible: Gothic (German) is available
- cheap from eBay - with even some 'new' unopened products
http://www.worldofgothic.de/index.php?go=shop_ebay
- new from Amazon.de (at least) as standalone (5€), in the collector edition, or Heldenzeit bundle (with Arx Fatalis, Gorasul & Etherlords)
http://www.worldofgothic.de/index.php?go=shop_gothic

The integrated In-Extremo concert is fun and well worth a handful of €

Any mod possibilities to add the concert to the american version?

Though I can at least show you what the concert is like:
http://www.youtube.com/watch?v=rB-2GLcalkE