First of all,
to the site. I hope you enjoy it here.
Yes, you are right, the Index.html does make the contents of the directory invisible.
To make this possible.
1. Open up Notepad.
2. Dont type anything, Just save the blank file as index.html
3. Upload the file index.html to your NTL space.
Unless you are a hacker, normal Viewers will now no longer see your directory and what it contains.