Can i have four radios in the same server with shoutcast

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I have third party hosting service running windows server 2003. I have upto 5 IPaddresses. My question is.....can i have four different radios frm the same server.....each one belongs to different generes. How can i assign the port no.'s for the shoutcast server as it allows only 8000 port. Plz help me ........waiting for ur answers....