65234 Simple linklist script

I need a simple linkpost script. The script should be able to handle categories. And only people who I give a personal password should be able to post links. I dont need a admin area for this. I can edit a textfile with all the passwords. I have made 2 HTML documents of how I want it to look. Example: [login to view URL] Linkposters should not be able to post a the same link twice. I want to be able to set how many links that the linkpage should show. I dont need a admin area for this. I can edit a textfile or something. New links should be added at top. I want the script to check if the description is longer then 40 letters. If not then the script should not accept the link and tell the linkposter to add a longer description. Only textfiles, no MySQL or other databases. I can pay with Paypal.