from comparing to WB previews, the pictured skins are:
1 - XPCobalt, been recoloured - an outstanding skin
2 - XP Charcoal, says so in the picture
3 - Corvette, says so in the picture
4 - XP Copper
i already have all of these installed on my machine, so i am fairly certain they are in the object desktop component "WB Skins02", version Jan02, which has been available for a little while now.
the most interesting thing was that XPCobalt can be recoloured. i really must play around with the recolouring options more
