addition of freight charges in grn by creating two po's one for material and one for freight(gta with service abatment)

Hi SAP GURU'S

          please help me regarding one of the requirment of my client,

the process is as follows,

creation of two po's one for material and one for transporter (in transporter po as it is related to gta we have done with service abatment as suggested in ossnote:1736781) my requirement is that how to add this freight cost while doing grn with respect to material po).

please suggest me if there is any other possible way to get the requirement.

Thanks in advance.

pavan kumar