see above

1) Open the game
2) Check settings
3) Next to template used it gives the name of the template(usually this says "custom" meaning it is not being saved as a template but it s still usable the same way) click the template
4) A pop-up appears asking whether you 'd like to make a game with these settings, click yes
5) make the game, check all settings though, the team-game/invited players are not always copied correctly i think and any member-features are usually lost for non-members(there are some exceptions)

In the game, click Menu--->Settings. Near the top you should see "Template used" and then a link following it. Click that link and it will take you to creating a game with that template. If you are a non member trying to use member templates, you won't be able to though.