John,

Java Jive said he used Paint Shop Pro to add some "information" to a .png,

/Any/ program can use those those "chunks" (and not"chukns" :-) ) to store
(textual, meta) data into. And thats the whole problem.

You can put a bit of text in there, but the moment you want to store
multiple pieces of information (name and date to name two) the way to
identify and seperate those pieces is fully upto the person who (or program
which) adds the metatdata, as there is no specification for it.

You can ofcourse decide use a program that puts an EXIF formatted metadata
block into them, but that needs its own not-as-simple parsing and doesn't
offer fields you can name yourself.

Yep, you're stuck between a rock and a hard place. :-)

Regards,
Rudy Wieser