Hi Once Again,
Just a quick note, as I feel people are getting the wrong idea to what I mentioned above.
Basically, a user will be greeted with a file field and a message field (textbox). Upon the user clicking "Browse", selecting there image, entering a message and the submit button being pressed, the message entered should be add secretly to the image/file. (Not visible within the picture)
Upon another/same user clicking "Browse" within another form containing a file field a textbox and a "decode" button, the message embedded previously in the image, should be revealed within the textbox.
This way, people can send message to one another, without other people having knowledge that the embedded message/text exists.