What are all the ways that can add fields in the output list of FBL3N transaction?

Hello dear experts,

There is this transaction FBL3N, which you might be aware of. Now, the requirement is to add 4 new fields in the output list of the standard program.

The fields are:

NAME1 KNA1

LOKKT BSEG

USNAM BKPF

TXT50 SKA1 -> SKAT

Please tell me how to do this apart from implementing the note 310886. What are the other ways?