Now the course completion certificates only show the first name, and they really should show the first and last names.
I've spent a few fruitless days banging my head on this one.
But now having read your customizing instructions very carefully again .... ten minutes - SUCCESS!
in about line 107 of mod/certificate/type/custom_landscape/certificate.php
cert_printtext(170, 230, 'C', 'Helvetica', '', 30, utf8_decode($studentname));
cert_printtext(170, 230, 'C', 'Helvetica', '', 30, utf8_decode($USER->firstname . ' ' . $USER->lastname ));
Thanks for a great mod