Das kenne ich aus anderen Foren!
Ich habe ihn bereits runtergeladen aber kann ihn nicht installieren

Kann mir das vielleicht jemand auf Deutsch erklären?###############################################
## Hack Title: Admin Private Message Manager
## Hack Version: 1.5.1
## Author: Nivisec (support@nivisec.com)
## Description: An Admin panel plug-in that allows
## the management of Private Messages
## on the board. You may sort by
## a variety of options, delete any
## PMs you choose, or optionally archive
## them for later use.
##
## Compatibility: 2.0.4 - 2.0.6, php4
##
## Installation Level: Easy
## Installation Time: 3 minutes
##
## Author Notes:
## Once installed, you will have two new admin panel
## options under the "User Admin" area.
##
## You should add a clause to your user registration area
## saying you are using this hack, as well as alert current
## users you have installed it. Otherwise, this may be
## illegal according to the current ToS the user signed up
## for and your country of hosting.
##
## YOU MAY THINK YOU ARE SEEING MULTIPLE MESSAGES WHEN ALL
## FILTER IS BEING USED. This is not the case, phpBB creates
## two messages for each PM once it has been read. One for the
## reader and one for the sender.
##
## Support: http://www.phpbbhacks.com/forums
## Copyright: ©2002-2003 Admin Private Message Manager 1.3x - Billy Sauls
##
###############################################
## You downloaded this hack from phpBBHacks.com, the #1 source for phpBB related downloads.
## Please visit http://www.phpbbhacks.com/forums for support.
###############################################
##
###############################################
## This hack is released under the GPL License.
## This hack can be freely used, but not distributed, without permission.
## Intellectual Property is retained by the hack author(s) listed above.
###############################################
## In the /goodies directory you can find:
## * version checker information
## * disabling the archive feature
## * disabling the show IPs feature
## * how to update from previous versions
###############################################
#-----[ UPLOAD ]------------------------------------------
# If you are having trouble understanding this section, read
# the goodies/understanding_upload.txt file.
#
nivisec_install.php to /
nivisec_schema/*.* to nivisec_schema/
admin/*.* to admin/
templates/subSilver/admin/*.* to templates/subSilver/admin/
language/lang_english/*.* to language/lang_english/
#
#-----[ RUN ]------------------------------------------
# If you do not want the archive feature enabled, read
# the goodies/disabling_archive.txt file first!
#
install/nivisec_install.php
#End