I'm running a website for a global company, and although we rank first in search engine results here in Ireland, a search done from other countries doesn't rank us as highly.

If I register the domain at other top level domain names (eg. example.co.uk, example.nor etc.) and then just mirror the .com site to those other domains, will I be penalised by search engines for having duplicate content?

Has anyone else faced a similar problem and found a way to capture the global search engine?

Thanks.