<font face="Verdana, Arial, Helvetica, sans-serif" size="2">Originally posted by aussiemate:
HI,
I'm planning a RTW trip for July to go from MEL-CNS-HKG-SIN-Frankfurt-LHR-Paris-Miami-JFK-LAS-LAX-MEL, and I have a few questions. I will book it through Qantas. Can I use Qantas miles to upgrade the Qantas sections (or BA, AA or CX parts)?
Can I earn Qantas points and tier credits on all sectors regardless of airline?
Thanks for any advice! 
Aussiemate</font>
Yes to the upgrade on QF sections
No to upgrading others
Yes to getting points and tier credits on all sectors operated by QF/AA/BA/CX. On the AA sectors you will also get any applicable status bonuses if you have Silver/Gold/Platinum status
Dave