OK.

1. Unzip the mod zip file on your local computer and go through the folders contained in the includes folder contained therein, changing every folder named YOUR_TEMPLATE to jsweb. Assuming that the override folders for that template are named 'jsweb'.

2. Then fire up your FTP client, and drag that includes folder over to the root directory of your Zencart installation. That will place all the files inside the mod in the proper places.

3. The last paragraph refers to the possibilty that you may have already created files in your override directories that are the same as the files this mod creates, causing a conflict. If, when you're uploading the includes folder, your FTP client asks you if you want to write over a file, this is probably the case and you'll need to read the text file specified.

All this stuff is easier than it seems right now, but you'll need to know these basics to go much further with your store, so keep at it.