Custom Infotype field is not displaying in Standard Payslip

Hi Friends,

I have to enhance standard remuneration statement program to derive the department text from custom infotype instead of from IT0001.

we are added the custom infotype field in PE51 form.

Here the department field is from custom infotype and text is stored in z-table. we need to pick this text in standard pay slip.

By using enhancment spots, we can change the include in standard payslip program.But where and how to write the code, please suggest an

Regards