I know what i'm supposed to do.
The problem is that doesn't work.
I'm using Classic (OS9) and using V4.
The only folders in the limewire folder are "root" and "UninstallerData". Everything else is either ".jar" files or other files with the exception of Limewire itself.
I've resorted in just placing the skin in the Limewire folder which doesn't make any difference.