Q: How do I make icons which display as XP "Tile" icons?

• These are the large icons which are shown when XP display file lists in "Tile" mode. These icons are 48x48 in size.
   
  To include this size in your icon, go to the File menu, choose New, then New Multi-resolution Icon.
   
  This will open an editing window in which you may add icons of different sizes and color depths. If you have an existing icon, you can open it separately, then use the green + button under the Magnify slider to add to the multi-resolution icon's window.
   
  For the XP desktop, you will usually want to include all of the standard Windows sizes when creating a multi-res icon (i.e., 16x16x16 colors, 16x16x256 colors, 16x16x32-bit, 32x32x16 colors, 32x32x256 colors, 32x32x32-bit, 48x48x16 colors, 48x48x256 colors, and 48x48x32-bit.