BADIs/ Exits etc for customising the view of SAP Inbox

Hi All,

We have a requirement in which we have to customize the view of the workflow inbox (SBWP).

We know, on the L.H.S of the inbox the workitems are clubed according to tasks, contents etc. Is there a way to create additional custom folders here. Like a dedicated folder for FI Workflows, a dedicated folder for HR Workflows etc. (Not via Tasks)

Are there any BADIs. EXITs etc for the same

Also on the R.H.S where the workitems are listed we can add dynamic columns via configuration in T-Code SWL1. But we can add upto 12 additional columns.

Is there a way to add more than12 columns here via programming approach i.e any exit/badi etc

Thanks,

Sameer Tapre