[SLUG] Tagging PNG files

[Erik de Castro Lopo <mle+slug@xxxxxxxxxxxxx>]

Hi all,

Does anyone know of a tool that can tag a PNG file with meta data?
I've found pngmeta which will dump it, but nothing that will add it.

TIA,
Erik
-- 
+-----------------------------------------------------------+
  Erik de Castro Lopo
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"The beauty of religious mania is that it has the power to
explain everything. Once God (or Satan) is accepted as the first
cause of everything which happens in the mortal world, nothing
is left to chance...logic can be happily tossed out the window."
- Stephen King