TREX - Service Request search

Hello,

I am trying to use TREX on my project.  Could you please help me implement these requirements:

1. I need to add the « Free text » search criteria in the search view of component SRQM_INCIDENT_H.  This view is used to perform searches on the Service Request object (BUS2000223).
2. The “Free text” search criteria should search within attachments linked to a Service Request.
3. I came across these 2 terms on several websites on TREX : “SES : SAP Netweaver Enterprise Search or Embedded Search” and “SAF : Software Agent Framework”. What is the difference between them?

Thank you.