Message Queuing in XI

Hello

We are having multiple interfaces going through XI connecting multiple legacy systems to R/3. Message exchange occurs from multiple systems to and fro to R/3.

Can it be possible to have a dedicated queues to individual legacy systems e.g. AS/400 system will get and post message on XI1 queue,Unix app will get and post msg on XI2 queue and so on?

does anyone knows how to set that and also how to set the priority on messages?

Thanks in advance.

Regards

Rajeev