As you may or may not know, Cebix forgot to include some useful tools in his files (https://github.com/cebix/ff7tools). To be more specific, they allow to decompress these files:
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WINDOW.BIN (several graphics, game font and VFW)
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OPENING.BIN (several logotypes and initial credits)
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STAFF2.BIN (ending credits)
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CO.BIN (Battle Square roulette images)
However, they do not offer a tool to automatically update the headers once you recompress the files. I programmed some tools in Python 3 to get the job done. I also included scripts to ensure the 4-byte alignment when necessary.
Regards!