No, by slices, I mean slices. Layers are diffrent, but are required as well.
If slices are there, use any tool you want to edit the buttons, then click "Save for Web" or equivilant, and it should slice each button individually.
Ah, I see. It's a sort of identifying each button (by some sort of algorithm) and to save it automatically to the filename (identically to the layer name?), isn't it? I should nevertheless be able to save each button under its own name by hand and it would do the same? To put it bluntly: can I design a button from scratch, save it under the right name and it would work?
Well, probably I've got to buy Photoshop, then, if not. Would Elements be sufficient?