Thank you all!
One final question - in speaking with MH's call center, it appears that we can't do OLCI or use the phone check-in # due to having a lap child in our reservation.
So, we'll have to get our BP once we land in KUL (we'll try to get it at a transfer desk in HKG, but not sure we'll succeed).

Is there a transfer desk in the Satellite building, before we get on the train to immigration???