Need a unity3d script using php/xml

I want a very basic script to learn things. What i need:: a plane is in the scene with www image script attached to it and i have instantiated the plane in the scene. Now what i want from you is - when i click on the plane or its instantiated clones, a gui open to add a url and save. Once i save, the url is stored in the xml, which is lying at [login to view URL] www image script [CODE]#pragma strict // Get the latest webcam shot from outside "Friday's" in Times Square var url = "[login to view URL]"; function Start () { // Start a download of the given URL var www : WWW = new WWW (url); // Wait for download to complete yield www; // assign texture [login to view URL] = [login to view URL]; }[/CODE] Ofcourse all the instantiated planes will show the standard image, but with your script i will be able to show different images on the cloned planes. I hope i made myself as clear as possible. Please do it in c#