sorry for the late reply but i been adding songs to the system and not getting online.
but the way to make it a wsz file from the zip file is just change the zip to wsz
you have to be able to see the .xxx extenstions on your files in order to change the name so if they are hidden then unhide them, or get someone that knows how to un hid them do it.
then all you do is right click the skin's zip file and rename it to .wsz
wsz = winamp skin zipped file.
mediamonkey 2.5 uses winamps skins because its the same style of player as the old classic winamp 2 player.