hi: I searched very much but could not get any idea. Actually i want this: - if someone want to add some extra functionalities in my script, i can offer a module file. User will add that module from admin control panel of script. And extra functionality added! For example: - i develop a script of forum. - someone wants that there should be birthday message in main page. - i develop a module, and give him. - he just add that module in control panel. - and now he get birthday message in main page. - At any time, he can also remove that module also! What is main idea behind this kind of script? How this will work? Thanks Burhan Khan