You can upgrade from ACS 6.0 with Alfresco Search Services to
ACS 6.0 with
Alfresco Search and Insight
Engine and you can upgrade from ACS 5.x to ACS 6.0 with Alfresco Search and Insight
Engine using a distribution zip. Depending on your upgrade path, use the information below
to update your installation.
Sending feedback to the Alfresco documentation team
Here are some instructions