Custom Field addition in Field catalog in GATP CPS scheduling

Hi Gurus

I have CPS scheduling enabled.

I want to add new Field / Custom Field ( eg. Business Event, Custom field from Material master) in CPS scheduling Field catalog.

Need to know the steps:

1. How to add the new Field in the CPS scheduling Field catalog.

2. How to map the field values from ECC to APO?

If you can share the technical details, it will be helpful.

Thanks

Sendil