The Witcher Enhanced Edition Blood Revival Patch

Just run the EXE and it should work out just fine
A patch for The Witcher Enhanced Edition, the improved and better packaged version of The Witcher, has been released, restoring blood to all North American versions of the game. The Witcher Enhanced Edition includes two new mods, The Price of Neutrality and Side Effects, a mod editor allowing you to create new adventures, lots of graphic and gameplay features (100 new gesture animations in dialogue and cut-scenes, giving conversations with NPCs a more natural feel, improved inventory, auto-save option, auto-looting of containers and a character differentiation mechanism), as well as lots of bug fixes and improvements starting with load times shortened by 80% and ending with a correction of all the English dialogue and voice-work.