cool, it's not in melbourne really, it's closer to bendigo, and in the right direction for you actually, from mildura go down the sunraysia, then turn left onto the start of calder hwy from that, keep going down calder till you get to bendigo and in bengdigo somewhere you get to a big t-intersection, turn LEFT onto the midland highway, (calder hwy continues to the right), then shortly after turn RIGHT onto the start of the Mc Ivor hwy, this runs straight to heathcote

thats just from a map of victoria but you may find a better way, maybe down the murray valley to london valley will be quicker hard to tell, im sure you'll figure it out