Step by Step Instructions
You will need the following..
[*]Windows 2000 / XP (probably Vista, too!)
[*]Basic Knowledge of the Command Prompt
[*]WinRar
[*]Gather your image and the files you wish to lodge into it. Here I have a meeting.txt which which I will slap inside my secret.jpg[
[*]Add the files you want to hide into a new RAR archive
[*]Open Command Prompt
[*]Go to the folder where your files are located, in this case ‘C:\hidden’
[*]Type ‘copy /b secret.jpg + meeting.txt.rar lizard.jpg‘ where secret.jpg is the original picture, meeting.txt.rar is the file to be hidden, and lizard.jpg is the file which contains both.
[*]Test the JPG by opening it, and verifying it still opens. If it does, try opening the file with WinRar!