Add additional cols in inbox

Dear All

Please help me with the below requirment

I would like to add additional information in the below screen for inbox

Like requestor name and Comapny code etc ..

I tried to use the POWL type as SAPSRM_IBO_FEEDER_WI to add the additional field ..in /SAPSRm/POWL_CUST

I also added in the structure  mentioned in the below doc ..

Add the field in result list

If you also want to display the field in the result list is necessary to add it in the structure /SAPSRM/S_POWL_RESULT_SC_ITM. There is an include reserved for this purpose INCL_EEW_PD_SEARCH_HDR_CSF_SC

Refereed the link below

http://scn.sap.com/docs/DOC-25692

Please advise what should be done further as I do see the additional custom cols added to the user inbox and how I can pass the corresponding data values to it ?

Regards

Vinita