Need a web based Sreen-writting software in PHP

Hi, Please mention "Pebble" in you bid or it will be discarded. So here is more about project. I need a web based screen writing software (References Trelby, studiobinder, celtx etc.), I am myself a developer but busy with other projects so don't have time for this one. So here is some of features I wish to have... 1. Basic Text editor with all the text formatting 2. Screen writing standard formatting, please have a look at the references 3. it should be web based 4. PHP preferred 5. should support multiple user accounts (Along with their past works) 6. feasibility switching on/ off for charging money to use the service 7. should import and export written script into industry standard formats specially .fdx 8. unique features combined from all the 3 references given above 9. I am okay with simple design, don't need any fancy, it should be flawless in functioning (EDIT: I have a basic design and would love to get something similar, design will be shared with awarded freelancer) 10. Admin dashboard for user management and stats about users time spent in writing also managing the payment functionality. If you have RTL solution or something in same direction, do share the url or demo. Payment terms: 2 milestones 1. 50% After 50% work (includes screen writing formats, import & export and multi user) 2. 50% after testing and at the time of handover I will provide FTP and phpmyadmin access Feel free to ask the queries. Thanks, Prafull