Releasing port 443 from IIS /Server 2003

We are using MS Server 2003.

We are wanting to use a java application for a secure webapge that binds to port 443. It is currently in use by IIS.

We have to run IIS on the machine. IIS (by default) binds to 80 and 443. And, of course, this application wants to bind to 443.

Is there any way to change the default ports that IIS binds to?

Thanks!