OK, can you point me to a tutorial on how to create an LHA archive and how to insert it into Aminet, please? If I find the time, I will do it. Thanks.
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Fair enough. Here's a tutorial for using LhA:
https://forum.amiga.org/index.php?topic=23259.0
About how to upload files to the world's largest Amiga file repository, here are the official step-by-step instructions (please note that they include using FTP):