The AddIcon directive determines the kind of icon the server uses to represent a given file type in a directory index.
AddIcon icon name1 name2 ... namen
icon is a virtual path to an image file that is shown for files that match the pattern of names. Alternatively, this can be a group of the format alt,icon, where alt is the three-letter text tag given for an icon for non-graphical browsers, and icon is a virtual path.
name is ^^DIRECTORY^^ for directories, ^^BLANKICON^^ to specify the blank icon used to format the list properly, a file extension (.html), or a wildcard expression.
You can use several AddIcon directives in the configuration file.
srm.cfg
There are no default icons.
AddIcon /icons/image.gif .gif .jpg .xbm
AddIcon /icons/dir.gif ^^DIRECTORY^^
AddIcon (SND,/icons/sound.gif) *.au