I can confirm that when we used the CRMCMP_CCS_EML component, the text was automatically loaded.
I did cheat a little on the instruction here. http://wiki.scn.sap.com/wiki/display/CRM/How+to+set+up+Threading+in+ERMS
I just entered the tracking no text fancy string as expected in
Fact gather get ticket CL_CRM_ERMS_FG_SVCTKT
Then put the actual ticket number inside.
Service Desk Tracking Information : {ticketno:[10000123]}
I used the ERMS Fact Base Attibutes: Service Ticket Number
Still think BT126 should be fixed to work.
Thanks for the value input Sigrid . Helped solve the problem.