I use on installer page, But you still use Button.png too. Otherwise the buttons will not appear.
Tip: When I want to use different buttons, i always set Button.png and ButtonSelected.png with the size 1x1. So i can use the buttons below and not have any issue.
Code:
Back.png, Next.png, Cancel.png, Music.png.
BackSelected.png, NextSelected.png, CancelSelected.png, MusicSelected.png.
BackClicked.png, NextClicked.png, CancelClicked.png, MusicClicked.png.
Diferent buttons for SmallButtons:
Code:
SmallButton.png, SmallMusic.png, SmallCancel.png.
SmallButtonSelected.png, SmallMusicSelected.png, SmallCancelSelected.png.
SmallButtonClicked.png, SmallMusicClicked.png, SmallCancelClicked.png.
I use this system since the CIU 1.0.0.3. But i cant remember if CIU 1.0.0.6 has support for all these features.
You need to thoroughly test.