How do I save/export the LIST of addresses in an Outlook 2011 Contact GROUP.

Simple question: 

How do I save/export the LIST of addresses in an Outlook 2011 Contact GROUP?

The Contact Groups are only stored locally so I want to export the LIST - I do not want to export all the contacts.

If I can't do it (no answer found via Google) how can I achieve the same thing? I thought I might mark all the addresses with a new category, export all Contacts, then extract those addresses with the new category.

That should work, however can I/how do I select ALL the addresses in the Contact Group in one go and mark them all with the new category? There are 450 addresses so I don't want to edit each one individually.

Failing that, any other ideas?

Thanks