You can use the following SQL query to find navigation path to a PeopleSoft component if all you have is the component name. Before running the query, replace string {COMPONENT_NAME} with the name of the component (enclose it in single quotes).
SELECT DISTINCT RTRIM(REVERSE(
SYS_CONNECT_BY_PATH(REVERSE(PORTAL_LABEL), ' > ')), ' > ') PATH
FROM PSPRSMDEFN
WHERE PORTAL_NAME = 'EMPLOYEE'
AND PORTAL_PRNTOBJNAME = 'PORTAL_ROOT_OBJECT'
START WITH PORTAL_URI_SEG2 = {COMPONENT_NAME}
CONNECT BY PRIOR PORTAL_PRNTOBJNAME = PORTAL_OBJNAME;