Need your suggestion on this implementation

Hi All,

Need your suggestion on this type of implementation in Biztalk 2006
application.

Scenerio:
One mqseries queue M1 receives messages of different type. Some messages are
of high priority and some are less. They wanted to create application with
multiple receive location pointing to the same queue(hope this is not
possible). They wanted this multiple receive location concept so that they
would specify "maximum messages in the batch" property to a specific number
for all the high priority messages and lesser number to the low priority one.
This would activate multiple orchestration instances based on the size so
that higher priority messages are processed faster.

Implementation :

Since multiple receive location pointing to the same queue is not possible i
suggested creating a single receive location. Separate Orchestrations are
created for separate message type. I have specified the filter expression in
the receive shape to retrieve only the particular message type.  In this
design how can i set multiple orchestration instance for the high priority
messages? To put it in a better way how could i configure/control the
orchestration instances?

Is there any other way to implement the scenerio?

Appreciate your valuable information.