Customizing F000 payroll schema

Hi all,

I am working on a payroll project for a company in a non-sap country.

I chose F000 PY Schema to copy and modify it for our needs.

I want to ask what should we change ?

I have a good understanding of ABAP-HR PY functions PCRs and Ops, and right now I am studying the Schema Log,

But I think that it is somehow huge.

Can anyone help by answering what are the points (PCRs & Functions .. etc) to change ?

Any other guideline or advice on this issue is welcomed.

Thnx in advance.