You could skin your entire windows system using StyleXP or WindowBlinds (StyleXP is much faster but has less features, and the opposite is true for WindowBlinds) they both have, amongst many, many other skins, Mac skins. Then LimeWire has a feature (View>Apply Skins>Windows Theme) that skins LimeWire to your current Windows theme, whatever it may be. A warning, though, don't try this on a slow computer! It can make LW crawl =P