Instructions
Download the Tiff exploit files from the developer's Website. Attach the PSP's memory stick to the computer's card reader.
Copy all of the files that you downloaded onto the PSP's memory stick. Insert the memory stick back in the PSP.
Go to the "Photo" section of the PSP 1000's main menu and select the "Tiff" exploit from the menu that comes up.
Wait as the Tiff exploit shows up on the screen and the words "Hello World" appear on the PSP 1000's screen. When this occurs, the exploit is finished.