Maven repositories

Hi,

E.g. there is an artifact antlr-2.7.7.jar in "http://repository.jboss.org/maven2", but m2eclipse doesn't show it in Add Dependency. If I try to put it manual in pom.xml with <dependency>, Maven doesn't accept it. I don't want to copy an artifact from repository in my local repository.

How can I configure my settings.xml or pom.xml that Maven accepts artifacts from other than central repositories?

Thanks beforehand,
regards, buters