i attended the UNSW Undergrad Medicine at the girl's school, and they made it quite clear they would not let people transfer from one undergrad med school to another, unless of special circumstances, and no more than 5 transfer places available per year... so i guess it's possible, but you can't say I'll go to UMelbourne for Med during 1st year, and I'll come back to UNSW the 2nd, they won't let you do that.