If you really want only your client and yourself to see it, why not password protect the directory?
1. Create a new basic text file
2. Insert
AuthType Basic
AuthName "Name that will appear on popup box"
AuthUserFile "absolute path to directory with the .htpassword that we will insert later"
require valid-user
4. FTP to the directory you want to protect with a password
5. Rename .htaccess
6. Create a new text file
7. Insert
Username:Password
(The password must be encrypted first in MD5)
8. Upload to the directory specified in the .htaccess file
9. Rename .passwd
Note, for security, it is best to have the password in a non accessible directory, outside public_html