Converting images if there are more than one or to can be a daunting task, converting nearly 900 of them from PCX to PNG in order to make them available for a larger public seemed like an impossibility, however a quick search got me to ImageMagick and next I knew I was scripting along, I know its crude and it can be beautified but it works.
The following requires that you have Imagemagick installed
for img in `ls *.pcx`; do convert $img $img.png; done
Changing the file name ending to the correct ending
for f in *.PCX.png ; do mv $f `basename $f PCX.png`.png; done
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