1)
-Change into you Plesk Admin htdocs directory (e.g. /opt/psa/admin/htdocs)
-Make a directory for the Plesk Qsheff Watch (e.g. "mkdir qsheffwatch")
-Set chown of the directory you made above to root:psaadm ("chown root:psaadm qsheffwatch")
-Set chmod of the directory you made above to 755 ("chmod 755 qsheffwatch")
-Extract all files of the ZIP into that directory
-Set chown of all files to root:psaadm ("chown -R root:psaadm *")
-Set chmod of all files to 755 ("chmod 755 -R *")
-Set the wrapper to chown root:root ("chown root:root wrapper")
-Set the wrapper to chmod 4755 ("chmod 4755 wrapper")

-copy the qsheff-log to your "daily cron dir" e.g. for debian "/etc/cron.daily"

============================================================================================================
IMPORTANT IF THE QSW DON'T WORK ON PLESK 8.x (WHITE SCREEN), SET ALL FILES TO 775
============================================================================================================

-make your settings in file config.inc.php

2)
-Login to your Plesk as admin
-Make a new Custom Button with the following settings:

Button label: Just choose a name ;-)
Location: Domain administration page
Priority: 100
Background image: choose the qswlogo.gif of the ZIP
URL: your directory you made above an the index file (e.g. "/qsheffwatch/index.php")
Include domain id: yes
Include domain name: yes
Include FTP Login: no
Include FTP password: no
Include client id: yes
Include client's company name: no
Include client's contact name: no
Include client's e-mail: no
Context help tip contents: whatever you want
Open URL in the Control Panel: yes
Visible to all sub-logins: yes (if your clients are allowed to manager their subdomains) ["no" in Plesk 10.x]

3)

Configure qshefflog.sh and activate it via cron (if intended to use)

4)

Configure quarantine management (config.inc.php and restoremsg.sh) if activated in qsheff
and intended to use.

IF YOU'RE USING THE ADDONS WITH PLESK 10.x A SPECIAL CONTROLLER IS NEEDED!
DOWNLOAD THE CONTROLLER AND INSTALL WITH THE INSTRUCTIONS FROM THE INSTALL.txt

Download -> http://haggybear.de/download/psa10_controller.zip

Since Plesk 10.4.x no additional controller is needed!