Any protocol level ordering of messages (MSMQ, WS-RM, MQ-Series) will guarantee that messages will arrive in the same order that they are sent. The order is maintained internally to the protocol using protocol headers.
They will not reorder messages based on some internal message semantic.
Likewise Biztalk will order messages using a FIFO mechanism.
If the receiving protocol supports ordered delivery and the sending protocol supports ordered delivery, then you can send messages in order from point A to point B via Biztalk.
If either the sending or receiving protocols does not support ordered delivery then you will need to implement another mechanism to guarantee order.