General Help from OCAD Website : The HowTos section is particularly valuable.
Geo-referencing an OCAD map : 22nd April 2014
Using a GPS with OCAD April 2010 includes section on Garmin Custom Maps
Notes on using Course Planning with OCAD Updated Feb 2014. These notes, although originally written for OCAD 9 are equally usable for versions 10 & 11 as well as CS. Menu locations are slightly different.
If you are a visual learner and like lots of screen shots you will like Neil Crickmore's (UK Orienteer) introduction to Course Planning with OCAD 9 Updated 2008
Setting up and managing Master Maps April 2010, Updated Sept 2011 to suit OCAD 10 plus considerable revision and samples
Using Google Photography in OCAD re-written 21st April 2014