Does anyone have any experience or advice in setting up multiple JBoss 5.1.x instances on the same machine that has 1 network card?

Here is what I did:

1. Installed JBoss 5.1.0.GA into c:\myjboss 1.5. I copied the server/default directory to server/ports-01 and server/ports-02 so they have their own config. did I assume correctly?
2. Ran .\run.bat -c ports-01
3. Ran .\run.bat -c ports-02

At this point there are 2 instances but the second instance doesn't load correctly because of what is probably a few port conflicts. For example: the http port ends up being 8080 for both instances, which it gets from line #49 in the C:\myjboss\server\all\conf\bindingservice.beans\META-INF\bindings-jboss-beans.xml file. Earlier in the server load it clearly gets the value from line#63 in that same file. I don't know why it gets part of the port config from line #49 and the other part from line#63. Confused.

I also tried: .\run.bat -Djboss.service.binding.set=ports-01 -c ports-01 and it made little difference.

Any ideas on what I am doing wrong?