To update the list you just need to create .ini file with game description (see examples in /usr/share/wgames/gamesinfo/ini), create image with game screenshot (450x150) and (optionally) postinstall script (again, see self-explanatory examples in /usr/share/wgames/gamesinfo/hacks). I will provide detailed description a bit later. And if you put these files into /usr/share/wgames/gamesinfo, the program will have a support for it. If you sure it does work, feel free to post your .ini here and I will add support to the next update.