[authorsindex]
.
Options are:
ul => the class of you ul element (default = iapAlpha)
li => the class of you li element (default = iapAlpha)
letter => the class of you span element(the letters) (default = iapLetter)
hide_empty => diplay authors that don't have any article (default = false)
optioncount => display number of post of the author (default = true)
show_fullname => show full name of the author (default = false)
exclude_admin => exclude the admin (default = false)
menu => show a menu of the index (buddypress-like) (default = true)
*listpost => display a list of the post of the author in a nice tooltip
index-tag-page.php
to the /wp-content/plugins/
directory[indextag]
according to the descriptionOf course it is.