F4 December 2014 – CBE/Paper etc???

Looking for some help/guidance on the following:

I am due to sit (and have already paid for) the F4 sitting as a paper exam in December. However, I understand that the format is likely to be available for CBE from September 2014 onwards. Therefore, does the structure of the exam change? Is the learning syllabus different? I will most likely use the BPP distance learning (with lectures) method along with the OT study material. However, I’m keen to start making some inroads into the work early on by printing off the OT paperwork but don’t want to start heading down the wrong path. Also, having sat the F1 CBE I’m aware you pay the centre where you sit the exam directly but having already paid ACCA for the paper exam I assume they can credit my account if I can convert to CBE in September and pay an approved centre direct again?

Thanks for all your help and assistance in advance!