Fabbe, I woldnt worry too much about the IPAS thing. If you're looking to apply to any of the integrated providers- I would highly recommend you looking at this link.
Get a Head for the Sky - Airline Interview Preparation
It is tailored for students applying to cadet schemes and is broken down into 4 phases ( Sound familiar) each one detailing what you can expect from Application through aptitude tests to interview and finally sim check.
Have a look....