Posted August 22, 2015
Here is the way to do it (its not obvious at all!)
On GOG.com (GOG Galaxy wont work to find the serial keys) go to GOG.com, click on ACCOUNT. Then click on LIBRARY.
Now click the arrow below Neverwinter Nights 2 Complete - select DOWNLOADS
In Downloads, click on the MORE arrow button then select SERIAL KEYS.
Copy and Paste the serial keys into the Multiplayer Keys window. When you paste then, check the END of each CD-KEY for spaces and remove any empty spaces at the beginning or end - spaces will cause your BUTTONS TO BE DISABLED because it sees them as invalid serial keys (this is stupid in my opinion).
If all the cd-keys are valid, the buttons will be enabled. If any spaces are in ANY of the cd-keys or any of the cd-keys are invalid in any way the buttons will not be enabled.
On GOG.com (GOG Galaxy wont work to find the serial keys) go to GOG.com, click on ACCOUNT. Then click on LIBRARY.
Now click the arrow below Neverwinter Nights 2 Complete - select DOWNLOADS
In Downloads, click on the MORE arrow button then select SERIAL KEYS.
Copy and Paste the serial keys into the Multiplayer Keys window. When you paste then, check the END of each CD-KEY for spaces and remove any empty spaces at the beginning or end - spaces will cause your BUTTONS TO BE DISABLED because it sees them as invalid serial keys (this is stupid in my opinion).
If all the cd-keys are valid, the buttons will be enabled. If any spaces are in ANY of the cd-keys or any of the cd-keys are invalid in any way the buttons will not be enabled.