SAP Note 751044 - Credit check with required qty instead of conf.qty

Hi,

I have a requirement where i have to use required quantity to calculate credit value.

I need to implement the SAP note 751044 for this. I need to know what logic needs to be written in the following user exits

LVKMPFZ1, LVKMPFZ2, LVKMPFZ3

if anybody has implemented the same please suggest me. I have already searched in sdn but i could not find the logic for this.

Awaiting for reply.

Thanks ,

Lata S P.