Hi revman and welcome to the forum.
Getting the files is a typical (should be) click on and download via your web browser. Some modules will be zipped and others not. Some mod will come with a readme file and others not.
So let us assume that you have downloaded the file and unzipped it if needed.
The next part of the issue is putting it in the right place. Using the drag and drop features of windows, take the file and put it into one of the following folders:
For SS version 4:
Copy the file to "C:/Program Files/SwordSearcher 4/user"
If this folder is not there, just make one
When SS opens, the resource will be there
For SS version 5
When you install SS5, there should be a folder created in your "My Documents" folder with the name of "SwordSearcher User Modules", put them there and when you start SS, they will be available.
Also, be careful that you use the right module version with the same SS version. Version 5 mods will not work in version 4. The filename for version 5 will look like: "filename.ss5book" or "filename.ss5cmty", where 4 will not designate the version numbers. Most version 4 mods will be importable into version 5 via the import function.
Hope this helps
God bless
Bro. Mike