@monologued not possibile to change that button's behaviour from the theme, it's hardcoded in wiiflow.
@spinoman backgrounds are automatically assigned to a platform when they match the platform's name and are placed in wiiflow/backgrounds/Rapsodii Shima. Open platform.ini and see how the various platforms are named exactly like the bg images.
There's no simple way to do what you say, and in my opinion is not worth it.
You could create duplicate backgrounds, named after the platforms you wish to add (see the 'Arcades' section of Rhapsodii shima, with many different platforms all with the same bg with the cabinet). However they would replace your individual backgrounds, so you would lose them.
Also, mixing plugins that use different covers sizes or orientation in one single flow (e.g. nes, supernes) will result in wiiflow showing all games with standard DVD cases.
Another way could be replacing platform names with a new one in platform.ini but they'll not work anymore individually.
@spinoman backgrounds are automatically assigned to a platform when they match the platform's name and are placed in wiiflow/backgrounds/Rapsodii Shima. Open platform.ini and see how the various platforms are named exactly like the bg images.
There's no simple way to do what you say, and in my opinion is not worth it.
You could create duplicate backgrounds, named after the platforms you wish to add (see the 'Arcades' section of Rhapsodii shima, with many different platforms all with the same bg with the cabinet). However they would replace your individual backgrounds, so you would lose them.
Also, mixing plugins that use different covers sizes or orientation in one single flow (e.g. nes, supernes) will result in wiiflow showing all games with standard DVD cases.
Another way could be replacing platform names with a new one in platform.ini but they'll not work anymore individually.