MT940 - How to change the text value in AC doc created through EBS

Dear All,

I would like to know how can we manipulate the payee details sent by the Bank so that unncessary things are removed from the text of the accounting document created through EBS posting (FF_5)

My bank statement has the below lines

:61:1001200120CX50,00FBGCNONREF//

:86:999/00BGCMDIR 5735826JAN185635826

After running the program the I see the below values

FEBRE-VWEZW : 999/00BGCMDIR 5735826JAN165635826

FEBEP-CHECT : NONREF

BSEG-SGTXT : NONREF 999/00BGCMDIR 5735826JAN185635826

I think, text value in the ac document is the concatenation of FEBEP-CHECT & FEBRE-VWEZW.

However I dont want FEBEP-CHECT & few initial chacters of FEBRE-VWEZW in my accounting document text. I would like the text to be MDIR 5735826JAN185635826

Can anyone please suggest how this can be achieved?

Thanks in advance.

Krishna