Jason, we can't list uuids(lol). The DERIVED macro does not like the dotted attribute so let us use aliases...
--in Administration->Service Desk->Application Data->attribute alias, create two new aliases:
cr assigneename assignee.combo_name
cr customername customer.combo_name
--change
assignee_enduser DERIVED( "Assignee:" assignee "End User:" customer );
to
assignee_enduser DERIVED( "Assignee:" assigneename "End User:" customername );
and recycle SDM and then modify the htmpl file accordingly
Thanks _Chi