Make Non-Automatic Sysaid Messages available to End Users through Self-Service Portal?

Is there any way to achieve this? I would like our end users to be able to see all communication on a ticket that was not an Automatic Email Message. I know there is an option to "Hide" all automatic messages in the Admin Portal, but End Users cannot see their communications on a ticket at this time. Any assistance would be greatly appreciated! Thank you, Gina Auer