Thanx for your patience Kulyok...
I have no idea if the fixpack modifies any 100500 files and I couldn't find any clue in the readme. What I did get is more doubts about installing. I got the "D0QuestPack_v23.exe" file and the "Big World Fixpack v11" rar. In the fixpack webpage (
http://www.shsforums.net/files/file/521-big-world-fixpack-v11/) it says this:
"Although it is made for the BiG World Project, it can be used with any other installation. Unpack the BiG World Fixpack.7z file in your BGII - SoA directory and start the batch file BEFORE installing the mods. The batch file checks for mods that are already in the main folder and copies the needed files into the predetermined folders.
The patch files contain only the changes, not the entire contents of the file itself. Therefore may in no case existing files be replaced with files from the patch!"
According to this, shoudl I move the QP file in the BG2 folder but run the fixpack batch file before running the QP exe? Damn... this is complicated... or I'm not too bright. :-P