How to *fix* Dungeon Siege expansion Legends of Aranna on Steam

Download the Legends of Aranna fix from one of the links below.
Extract the content of the archive to your 
Dungeon Siege installation folder, overwriting all files when prompted.
(Optional) Rename 
DSLOA.exe to 
Dungeon Siege.exe if you want to run Legends of Aranna from GOG/Steam.
(Optional) Run the reg patch from the 
Dungeon Siege installation folder and select option 1.
Reference:  https://gist.github.com/GenesisFR/f3df7f092db17dd63d85eb1f19da7153
Instructions for DS2 Broken World expansion:
Download the Broken World fix from one of the links below.
Extract the content of the archive to your 
Dungeon Siege 2 installation folder, overwriting all files when prompted.
Run the reg patch from the 
Dungeon Siege 2 installation folder and select option 1.
Same reference as previous.