CATS Integration with HR,PP,PM/CS,PS

Dear Friends

Can you please tell me how to Integrate CATS with PP module. I don't know what input fields I need to maintain & also we are using CATS in ESS. for that I've already created a profile & called it into the portal. But how can we do Integration?? I've seen few t-codes where the cats data is getting transferred to PM/CS,PS,CO,HR. but none of them has showed me a t-code or table which is related to PP module. we are now integrating CATS with HR,PM,CS,PS & PP modules. It would be very helpful if you can suggest me with the best solutions.

Regards

Pradyp