hi jeffloujed! you can attend COA & CIIP even without yet the VISA. Just bring with you copy of the invitation flyer they've coupled with the medical request. Me & my hubby (without VISA) have attended the two orientation programs and both were just too informative and useful in our integration to Canada...For CIIP, they will need a copy of your resume. They will teach you the Canadian way of preparing CV. It's more of helping you how to successfully land a job in Canada. Gives you idea where job market is high while COA is more of the Cultures, way of living, expectations during your first few months in Canada. I strongly advised you to attend the two programs!!!
No idea with PDOS. But I'm trying to network with forum mates regarding this. 'am not sure if it still necessary for us to attend PDOS should we enter Canada from Riyadh.