Note: Make sure you have a good 72dpi photo of your camera. I suggest visiting your manufacturer's web site or a good camera review site such as dpreview.com to get one.
To create the large image:
- Make photo background white
- Resize your photo to 59 pixels wide
- Pad photo with white space to 59x58
- Set white background to be transparent
- Save as "camera.tif": (LZW TIFF, with alpha channel to preserve transparency)
- Use camera.tif as source image
- Resize to 20x20 pixels
- Save as "camera_small.tif" (same settings as above)
Using OS X:
- Quit iPhoto
- Make a backup of iPhoto (always!)
- View contents of package (use contextual menu on iPhoto)
- Copy images to Contents/Resources folder
- Confirm replacement of the two files
- Load iPhoto
- Click the import tab

