HR Trigger in GRC 10 with interface to change 0105 data

Hi Friends,

Has someone had experience of enabling HR trigger with core ECC system built on ECC6.0 and HR system built on seperate ECC5.0 system ?

Also client has email ids of the employees maintained in 0105 field of HR database instead of user ids.

Is it feasbile to extract the text before '@' from that email id and treat it as user id for remaining processing ?

Please provide your views on the same.