The default notification script for nagios is very simple, why not get more information on the email. Like: hostgroup, how long has the problem happened, link to the possible documentation. And format it in a nice html table.
To work, create two new commands at:
The code for Service:
The one thing I still could not do was to link it to a Acknowledge Page, unfortunally with centreon there is no such page as there is with nagios.