I'm pretty sure you cannot use this routing. I just booked some tickets on MH as well, we were looking at Australia but finally picked SE Asia and i had asked questions about this, trying to find a way to stop both in Europe and Asia and finally got what appear to be definitive answers. For starters, you have to come back the way you came, so no RTW. But that shouldnt be a big deal for you... MH flies both ways, either westward LAX-KUL-SYD or the eastward EWR routing you mentioned. There is great availability on MH in business so you wont have any problem getting this to work. You can also fly the KE routing thru ICM both ways, and I've heard KE availability is pretty good too. You also get a stopover and can do one open jaw (e.g., land in SYD depart from MEL). This can add some value to the award so use it if you can.