you can add it via LPD_CUST ESS MENU and include the link there.
or you can add it via the Personal profile page using Component configuration
http://help.sap.com/erp2005_ehp_05/helpdata/en/38/fd1f7ed337404cae5c8a23
41dbdca4/content.htm
Adjust Infotypes in HRPAD Model
Use
In this Customizing activity you can use the report Edit Infotype Objects
in BOL Model HRPAD ( RPPAD_GENERATE_HRPAD_MODEL)
to adjust infotypes in the business
object layer (BOL) model HRPAD, which is used for the Personal
Profile application. The report automatically checks, creates, updates, and
deletes infotype objects in the model, as required.
As a second step in this activity you can view and transport the changes to
the model.