Need some help (Opera Skin)

Hi, I have checked the tutorial on how to skin Opera, but I have a question, how can I change the background color in (for example) the toolbar where you can find the Rewind; Reload etc buttons? Can I have an image as a background in there too? :)

Someone told me that I had to edit these lines:

[Addressbar Skin]	Type = BoxTile	Tile Center = your/picture/here

But I can't find them anywhere...

#326659