If you're referring to the *theory exams* you have to pass (in the JAR/EASA system) then it's as Reddo wrote: Forget about the CPL theory and do the ATPL exams. The ATPL exams cover CPL & IR content, making the CPL exams superfluous for licence issue. If you the did the CPL exams you would still have to do the ATPL exams later (so extra cost & mucking around).
If you're referring to *licence issue*, you will only get a CPL at the end of your training no matter which exam set you do. Contrary to what the training industries' glossy brochures seem to highlight, you don't walk out of the school with an ATPL, only a CPL (+IR and ATPL theory and maybe a Multi Crew Co-operation course). That combination is often referred to as a 'Frozen ATPL' even though the licence that gets issued is a CPL, not ATPL - and it will remain a CPL until & unless, later in your career, you accumulate the required 1500 hrs experience (+ subdivisions) & pass an appropriate skills test
Last edited by Tinstaafl; 16th April 2012 at 02:57.