How to set Custom screen in ME21N when Payment Terms as particular value ?

Dear ABAP Experts ,

        I have a requirement that when the user select Payment Term as '0001' in ME21N t-code . then they want new screen (in that screen there are different types of input fields are available and these fields field by manually) . When the user Click on SAVE button all these details will save in one Custom Table(Z-Table).

How can i do This issue.

Thanks & Regards,

Chinna...