Custom Infotype _HCM

Dear Colleagues,

Require to create Custom Infotypes for Joining , Separation & Back Graound check.

I understnad we can do it using T.Code PPCI.

However i am not able to do so as system is giving message to check for the Info type number.

Please guide how to go about it.

Note:- Development to be done without the help of ABAP consultant.

Regards,

Garima