I understand your requirements and ready to start this job.
I need clarification of what will be stored in the text file. Beside that everything sounds easy, it's something I can do in few hours.
Mini-profile
I´m a CS engineer with 25 years of programming and project management experience.
Professional freelancer with 12+ years of experience in Web Development including Joomla, Wordpress, osCommerce, technologies: PHP, CSS, Jquery, MySQL, etc.
Looking forward to work with you!
Thanks