Hi Yael
Firstly you do have to apply via satac.
I am just about to finish my nursing degree from unisa, however they are having a major overhaul on the degree program so I can't really tell you much about the new program.

This link should tell you a bit more about the courses http://www.unisanet.unisa.edu.au/pro...IBNU&Year=2007

With regards to your previous study it may be better for you to complete the three course you have left that way you could enter the nursing degree as a graduate which will take you two years to finish instead of three. If you don't want to finish your degree you will need to speak/email the program director providing information about the courses you have studied so that they can work out how much credit to give you.

As an external, you only go to workshops that have a placement attached to it. The workshops (although this may change with the new program) usually run for two or three days which you have to attend. But that is all you need to come to Adelaide for, you can do your placements in Melbourne and also arrange to do your exams in melbourne also.

With regards to midwifery after, that is in the process of going through some changes. It is now an 18 months course, full time or 3 years part time.

Good Luck.