Here is info on the upgrade for people who already have the game:
Bought The Witcher? Awesome! Now, how about upgrading it with all the features about to be released with The Witcher: Enhanced Edition next Tuesday?
If you bought the original version of The Witcher and registered it at thewitcher.com, you’ll be able to download all of the great content from the Enhanced Edition for free starting September 19!
That’s right – FREE! No strings attached, just good old-fashioned FREE. Log in and download.
You may be wondering – “What do they mean by ‘all’ of the content”? This is what we mean:
# Patch 1.4 (which turns the standard edition into The Witcher: Enhanced Edition)
# D’jinni Adventure Editor v1.4
# Two new adventures (“The Price of Neutrality” and “Side Effects”)
# Making-of videos
# ‘Inspired by The Witcher’ music CD
# Official soundtrack of the game
# Game manual
# Official game guide
# Map of The Witcher’s World
You may notice that “all” in this case doesn’t include the short story that is found in the retail version… unfortunately getting that released online would be some sort of massive undertaking involving numerous book publishers around the world. So it’s almost everything.Pretty impressive, isn’t it?
Know-how to installation of Enhanced Edition
1. Download the Patch file (it’s something about 1GB)
2. Download the language file/files (more or less 500 MB)
3. Gather them In one folder
4. Start the installation of the Patch.
5. Enjoy The Enhanced Edition
6. (Optional) Download bonus content & soundtrack