sabbasolo

I need to fly MEL to IAH in July, as part of a RTW ticket issued on UA stock. My options are MEL-LAX and then LAX-IAH, but we all know how much fun it is to enter USA and transfer to domestic in LAX.

My wife suggested MEL-SYD on QF domestic, and then UA 100 SYD IAH, which is nice, but a few questions arise:

1) Will I be able to get UA to include a QF domestic sector on the RTW?
2) If I put MEL SYD as a ground sector on the RTW fare, and buy the QF sector as a separate fare - can it still be on the same ticket/PNR? If not on the same PNR, it seems to me that QF won't interline, and then it doesn't work. (Can't use airside transfer and not enough time)
3) If I buy the MEL SYD sector in Y, and the RTW is C/Z, what the baggage allowance on the QF sector?

thanks