Thanks to my friend Raj from Raaj Photography (http://raajuk.com [1]) who found this workaround.
GML only imports from open sources. Thunderbird however imports from outlook express. This long-winded work around should do the trick for people wanting to permanently dump microshat software.
http://www.wikihow.com/Import-Archived-Outlook-Email-Into-GMail-Using-GM... [2]
Links:
[1] http://raajuk.com
[2] http://www.wikihow.com/Import-Archived-Outlook-Email-Into-GMail-Using-GML
[3] http://del.icio.us/post?url=http%3A%2F%2Fwww.elysian.net%2Fcontent%2Ffrom-outlook-gmail&title=From+Outlook+to+Gmail
[4] http://digg.com/submit?phase=2&url=http%3A%2F%2Fwww.elysian.net%2Fcontent%2Ffrom-outlook-gmail&title=From+Outlook+to+Gmail
[5] http://ma.gnolia.com/bookmarklet/add?url=http%3A%2F%2Fwww.elysian.net%2Fcontent%2Ffrom-outlook-gmail&title=From+Outlook+to+Gmail
[6] http://www.facebook.com/sharer.php?u=http%3A%2F%2Fwww.elysian.net%2Fcontent%2Ffrom-outlook-gmail&t=From+Outlook+to+Gmail
[7] http://www.google.com/bookmarks/mark?op=add&bkmk=http%3A%2F%2Fwww.elysian.net%2Fcontent%2Ffrom-outlook-gmail&title=From+Outlook+to+Gmail
[8] http://technorati.com/cosmos/search.html?url=http%3A%2F%2Fwww.elysian.net%2Fcontent%2Ffrom-outlook-gmail