Hi Reshma
It's all manual to do this via PFCG
I know a few clients who have developed custom load tools and hit the AGR_1252 table directly. It is a high-risk to ensure there is not corruption of values (in one place they accidentally loaded cost centres without the preceding zeros which didn't show up in PFCG as an issue). After they run the program they then run SUPC to mass generate them.
Regards
Colleen