I had nothing to do today so I tested some games and made the .ini and the .png file for each game that worked.

Games working:

Astraware casino
Battleship
Deer Hunter
How to Train Your Dragon
Radiant
Raging Thunder2
Toonwarz
Transformers AG
Uno

You have to copy each .png in /usr/share/wgames/gamesinfo/images and each .ini in /usr/share/wgames/gamesinfo/ini

download it here

It's a folder named 'preenv' with two subfolders: ini and png.

You have to copy each .png in /usr/share/wgames/gamesinfo/images and each .ini in /usr/share/wgames/gamesinfo/ini

Simplest way:
(assuming you extracted the folder /png in /home/user/Mydocs)