In case you have any question or problem not discussed and solved here, look for general support or contact me.

How can I be notified if someone writes a message?
You can use GuestBook in conjunction with FormEMailer in order to:
1. add the guestbook message
2. send it additionally to you

Can I search through a guestbook, how about authenticating first?
This guestbook provides a simple 'in place' workflow and does not need external resources like a MySQL database.
On the other hand it lacks sophisticated user authentication, opt-in handling and fancy search facilities. For that you will have to look for other resources...

Some visitors entered strange messages in my guestbook, how do I remove them?
The guestbook file contains the core html code which is needed to display the entries - simply open this guestbook file and edit it as you like.

My page always looks weird/empty when using GuestBook!
The guestbook file must not contain any html or body tags - create a new empty text file instead.

I can not save any messages!
Make sure that the specified guestbook file can be written into by PHP by adjusting the file permissions - you can do this by clicking on the remote file and looking at the permissions in the inspector.