In Windows you can set a custom image for folder icons. This is pretty cool, as it can help you to quickly and easily identify folders without reading the list of names. However, the way Windows stores information about which image file to use as the icon is by writing a hidden file called desktop.ini in the folder in question. Inside this file is a line that identifies the path to the image file, but by default it is an absolute path which includes the drive letter. Thus, if you put an image inside a folder on your USB stick or portable hard drive, and set it as the folder’s…