What I've done in cases when the mod isn't officially abandoned is use the "Upload Patch" facility if the author has enabled it.
You don't run the risk of treading on any toes that way since the author himself has implicitly given you permission to post patches to his code.
Upload Optional Patch is the link you want for Hunter's Helper specifically.
You can choose to upload just your edited files (in which case the users will need to have the original and overwrite with your patch)
or if you want to make it extra newbie friendly you can upload the whole package including your fixed files.
It will also make it easier for the original author to find and review your changes in one location instead of going through the comment section for bits and pieces.