Select icon file (GIF image):



Copy the encoded data from above and set it as an element of array $I in index.php. For example, if you have just encoded an icon for ".jpg" extension, you'd add this:
$I['jpg']='<PASTE ENCODED DATA HERE>';

If you want to use the same icon for many extensions, do something like this:
$I['gif']=$I['jpg']=$I['png']='<PASTE ENCODED DATA HERE>';

If an icon has already been set for an extension and you want to replace it, just encode the icon and paste the new encoded data between the quotes, don't do the step described above. It would still work but you would increase the size of the index.php file.