all I can tell u veagardo about studying OMT in australia is that it is only offered by one institution Charles Sturt University at Wagga Wagga. I can tell you that a majority of the course is by distance education and goes for 3 years. You are required to complete 1 week per semester of clinical practice.
This course is however not deemed sufficient in clinical hours to be recognised within Musculoskeletal physiotherapy Australia as a manipulative therapist.