Advanced Guestbook

I set up the advanced guestbook, following the instructions, but have a questions.
1. It said to set up your database settings which included the password for the MySQL Database. Is this secure since it is not encoded and sits on the server, or can people view that code somehow and find out the password?

Please respond, as I am worried about putting the page up on my webserver, if they can see the password

its secured trough .htaccess file which is in /admin subfolder.
thus nobody can view your config.inc.php, which is located in same folder.
.htaccess files sets apache directory permission to selected directories and/or files ... if u dont know what im talking about ...