So bear with me, if I have a cpl-h and a ir-h and I guess a proper number of hours (pic, ir, night, cross-country, etc) I can automatically upgrade to an atpl-h without further exams? Is that so?
If you have a JAR certificate and you do pass the ATPL check-ride, then you are correct. No further theory to read. Bear in mind that you do need some multi-crew hours as well to qualify for a JAR ATPL.