In Reply to: ahhh, thats a good question! posted by surfaddict on Friday, 4. September 2009 at 19:12 Bali Time:
your country of departure as Indonesia and language as English (unless you prefer Bahasa!)
You can only book the DPS-Perth leg this way, because if you select a flight departing Australia it reverts to AUD.
I had a bit of a play and could get fares DPS-PER for IDR708,000 (about AUD80). I didn't search further but there may be cheaper ones.
PLEASE NOTE I have not actually booked tickets this way so ***disclaimers, etc***. TBH with fares this cheap it hardly seems worth bodging it to save $40.