PNG Image Replacer: Perl script to replace some PNG images in PCF file with new images. Place old images to be replaced in local /old folder and their replacement images in local /new folder. png_swap.pl will scan a PCF file for images that match the ones in /old and will replace them with their counterparts in /new. Compares are done based on CRC32 values on the decoded PNG image content! (PENG saved PNG images are not identical to their imported sources due to differences in the compression used - took me a while to figure this one out!)

Requires Perl to be installed (e.g. from http://aspn.activestate.com) with Archive::Zip and Compress::Zlib modules.