Need guidance - cwa inter

Guys, I've given my IPCC Exm Now and 've to write CWA Inter next month.....I just have 15days to prepare for it...but, I don't know how to start and what to start?? Can you please guide me to go through this preparation ?? Will Scanners help me? O.M is new subject to me and how to study it? any other guidance ??  thanks :)    :W