Originally Posted by
plunet
It seems to me that the question is whether the OP needs to do anything for their bags to clear customs in Manilla (collect/recheck) or if they are checked through to the domestic destination and they clear customs there.
(I don't know the answer)
You have to pickup your bags at MNL if connecting from an international arrival to a domestic departure.
Also the shuttle from one terminal to another goes out onto the public roads and you can get caught up in traffic. Plan a decent connection time.