this Tool, is the actual Icon temporary Mime-type creator for KDE 4 with
891 PNG Filetypes
on 256x256 in 300 ppi
it is create clean files with transparency background for easy open, past and save
the icon in the right size and deph.
if you want have a other size and deph change the script and the temporary-png,
there the "temp256x256-300ppi.png" in an other size.
if you have all finish can you copy of move all finish png's
into the mimetype-folder of icon themes.
Happy Icon creating :D
bests regards from the Mandriva Community
Member of Mandriva Community Distribution