How is this done in terms of best SEO practices?

Basically, as follows:

For Norwegian version of the website: http://listerfriluft.no

For English version of the website: http://en.listerfriluft.no

Is it correct that UrlReriting.config is 301 recirect and is preferred over HTML codes like <link rel="canonical" href="http://listerfriluft.no" /> and like <link rel="canonical" href="http://en.listerfriluft.no" />?

I have now added this to UrlReriting.config (see. the black field below).

Is this configuration right? Maybe I don't need name="enLanguage" since English website version has only one subdomain?

Is UrlReriting.config redirecting automaticly?

<? Xml version = "1.0" encoding = "utf-8"?>
<Urlrewritingnet xmlns = "http://www.urlrewriting.net/schemas/config/2006/07">
  <Rewriter>
    <Add name = "seoCanonical"
            virtualUrl = "http://www.listerfriluft.no/(.*)"
            rewriteUrlParameter = "ExcludeFromClientQueryString"
            destinationUrl = "http://listerfriluft.no/$1"
            redirect = "Domain"
            redirectMode = "Permanent"
            ignorecase = "true" />

    <Add name = "enLanguage"
             redirect = "Domain"
             ignorecase = "true"
             rewriteUrlParameter = "ExcludeFromClientQueryString"
             virtualUrl = "http://en.listerfriluft.no/(.*)"
             redirectMode = "Permanent"
             destinationUrl = "http://en.listerfriluft.no/$1" />
  </ Rewriter>
</ Urlrewritingnet>

Want to avoid double hits in Google search, and the question is whether this is the way to do this?

For those visiting the page from Norway, I want visitors coming to the URL http://listerfriluft.no and only hits from Norwegian pages, not from English pages wishes to display in Google search, and added this:

<Link rel = "alternate" hreflang = "no" href = "http://listerfriluft.no" />

To all visitors from all other countries, I will visitors to come to the URL http://en.listerfriluft.no, and no search from Norwegian sides, only search results from the English website version to appear in Google search, and have added this :

<link rel = "alternate" hreflang = "x-default" href = "http://en.listerfriluft.no" />

Is this the way to do it as best SEO practice? Should I add support and redirection of detection of IP addresses as well (hope it is not necessary)?

Anyone..?