Obviously a WinAMP 2.x skin...with a fixed format....that's no problem...but if there are transparency regions and they are 'identical' then it'd be a rip of the regions.txt coding...and therefore a rip.
[even the bits you DON'T see are part of the skin]
WB skins....same thing 'could' apply...the cut-out shapes are identical?...then it's a rip...again, if it has a custom 'outline' [abnormal intricate shape]..that's part of the skin design, no matter what pixels are put into that shape.
If it's a standard Luna WB 'shape', namely 'square', then it's not a rip but a standard form.
An example of what I'm getting at....my Blame Maxim WinAMP skin...[You probably know the one....all that trans]...sure, you could put all your own graphics into the skin but if the pos/neg areas of the result are exactly the same shape as mine then it 'must' be a copy because those regions are unique and have no relation to the general WA 'button zones' except for they are obviously somewhere within them for the buttons to function.
Try marketing a pottery port 'flask' molded in the shape of a traditional Coke bottle and see how far you get.....sure, different pixels/material, but same shape.....ain't gonna happen...