Release strategy for POs

Hai everbody

I have a requirement regarding release strategy of the PO.

As per the standard SAP when we relese the PO release amount is net amount without the

delivery costs and taxes. Now my requirement is PO release amount should include

delivery costs and addition taxes which is shown under the head Landed price in the PO (me23n)

under conditions.

SAP has suggested user exit for this.

user exit "M06E0004" and suggested to use the CEKKO-CEKKOZZ field.

but this is a single character field.

How shall I code this.

First of all i should store the net value incuding the delivery cost in some table field

and then use it when it is displaying.

Please suggest me.

This is an urget requirement, please send your responces as early as possiable.

Thanks in advance.

Mahitha.