WordPress.org

1. Download the package with the newest version of Sell from Blog from the official WordPress.org repository
2. Go to Plugins->Add new menu
3. Upload tha plugin to your server and activate it

Configuration

Configuration menu is at Settings->Sell from Blog

1. Sign up with a premium SMS service provider which will give you a package of codes for you to validate against.
2. Enter the codes in the configuration panel, comma separated.
3. Create a secret directory inside your WordPress installation, for exmaple `/secret32Dfk8lcDR/` and set it to be readable only by you and the web server (750, rwxr-x---)
4. Put an empty index.html file inside the folder.
5. Put your file inside the directory and make it readable only by you and the web server (640, rw-r-----)
6. Put a `.htaccess` file into this directory, containing only this line: `deny from all` (if you are on a web server which does not support .htaccess, find othe way to block access to this directory from outside)
7. Put the path to the file in the configuration panel, for example: `/secret32Dfk8lcDR/my-ebook.zip`
8. It's a good idea to compress your file beforehand
9. Configure the confirmation message and the email message
10. Write a sales page and put `[sell-from-blog]` shortcode wherever you want the form to appear.
11. Remember to inform your buyers how to obtain the premium code, and to put a TOC of the premium sms service