Posting additional sickness data in IT2001 via custom fields

Hi,

We are using wd abap based ess/mss on EhP7.

We have a requirement to add two additional 40 char length fields as dropdown for sick leave (Sickness Category and Sickness Description).

We cannot use the existing customer fields (CUSTOMER01...CUSTOMER10) as they are all char20 in structure 'HRESS_S_PTARQ_LR_FORM' used by the Feeder class CL_HRESS_PTARQ_LEAVREQ_GUIBBF. So I added two char40 Z fields (ZZSICKNESS_CAT and ZZSICKNESS_DESC) to the structure 'HRESS_S_PTARQ_LR_FORM' via an append structure.

The custom fields appear in the screen and I can populate them with data.

We have also added two custom fields to the infotype 2001 screen for subty 200 in backend.

Can you please tell me how can I post the data into Infotype 2001.

Should I use the SEND & APPROVE method in the feeder class?

OR

use BAdI 'PT_ABS_REQ'?

Problem using the BAdI is I cannot see my custom fields in the import parameter IM_ATTABS_TAB. How can I pass the values?

Please help.

Thanks

Arindam