Upgrade instructions for installing PhotoPost 8 are included in the documentations folder of the downloaded code.
No what I am saying is to do a mysql backup which may not be supported on all servers you would fill out the proper information on the path to mysqldump and the path to a backup directory you have created on the server with 777 permissions then if your server supports you using mysqldump it will backup your database tables to the backup directory you specify.
You should always upgrade also to fully support the newer features of PHP and keep up to date which is why I suggested upgrading.
Safe Mode right on our details portion of the product under hardware software requirements this is where we state safe mode must be off. With safe mode on it does not allow the script to perform the actions needed to work properly.