This is still rough, my apologies.
Download the tarball linked on the side.
On your server, create a user. The code assumes the user will be user "horus" with a home in "/home/horus"
Untar the downloaded tar file in the horus user home.
Create a mysql database and import the schmea from "support/horus.sql"
Edit lib/Horus/DB.pm to match your DB connection string.
Create an apache virtual host that points to the "www" directory of the tar file. ExecCGI privaledges are required and the extension ".cgi" should be enabled as a CGI.
The CGIs and code requires several perl modules, including the VMware virtual client libraries. Install them in the standard locations.
Install the cron in "support/cron.d" as the user horus.