First, there is no reason to use a bigger size on the letters. We can read what you write without any problem with the normal font size.
Second, this is not a forum where you post and somehow magically get a lot of code. We will however help out if you post code and have some error you can't find or you need other tips.
Third, don't use the attitude that we HAVE to help you out, that we are only here to help YOU out. We are not. We don't get paid, we do this on our own free time because we like to help out. But we don't want to get that attitude, it is the best way you can use to make sure that you won't get the help you need.
Forth, if you don't know PHP then take some tutorials and read the manual. If you don't know any database language do the same there. Then use the knowledge to do something small, then design the guestbook and then do the guestbook. When you have problems and questions look in the manual and search, then ask if you can't get it right.
