I do not think you will be able to process that request throgh ACCA. I believe you must attempt P1 to P3 before you can choose your options. For example say you had done P1 – 3 exams…..passed P1 and P2 but failed P3, you cannot decide to just do your options and leave P3 for last. You would still HAVE TO click on P3 (ie pay for the P3 exam) and choose your options.