Dave,. .Go to the <a href="http://www.aafc.adfc.gov.au/cgi-bin/ubb/ultimatebb.cgi" target="_blank">Australian Air Force Cadets Bulletin Board</a> and do a search in both General Discussion and the Flying forum for something like 'Flight Screening' or similar words.
Lots of the cadets have been through Flight Screening and there may be some clues there as to when/how the screening is done.
Hope it helps.