Enhancements for me21n and me22n

Hello there,

I hope someone can give a hint on implementing an enhancement for transactions me221 and/or me22n.

The requirement is that while creating a PO, when the user presses ENTER after entering a specific material code on a line, another line should automatically be created with another material code.

Hope I have been clear.

Thanks in advace,

BR,

Tabrez