In the README there is following:
1. Copy the “Custom” folder and its contents in to your
Zeroshell router’s /Database directory
How is that done?
Get the patch on to your Zeroshell box. You can get to the shell prompt on the Zeroshell box and use wget to grab the patch from the URL.
Then use shell commands to uncompress the file and move the contents into the very obvious /Database directory.
It seems that there is an update facility in Zeroshell – is it possible to package this as an update?
I don’t think that the update facility is functional yet. At least Fulvio hasn’t been using it for distributing new beta versions of Zeroshell. And even if it were, you probably would not want a potentially untrusted third party like me being able to insert my changes directly into an official update path.
So as it stands now, the patch is for people knowledgeable enough or desperate enough to want to jump through some hoops. 🙂