Hi Double_Barrel,
Unfortunately thats the way to get an air side pass. You need to go to the security office near customs and request to register for the one day course.
After attending the course, you will need to get a Good Conduct certificate, have your picture taken at the KAA office, fill in the application form and wait for vetting. You will pay 3k for the pass. Vetting may take a month or so depending in how soon the 'board" sits.
My 2 cents.
Best of luck