Lost comments

I am a bit sad. I swapped comment service for my blog, and all the comments that has ever been made in this blog is now deleted forever. New comments from now on will stay, but the old ones are still gone. Maybe I can retrieve them, but I don't know how.
I think the file that contain all the comments is an XML file. The blog service that I used before was called Echo: (Link to Echo)
If anybody has a clue, I would be extremely grateful for help or suggestions.
Sad me
- Åsa

Update: I have the comments in an XML file: aasaaaaaaaaaaa.blogspot.com-comments.xml

but I don't know how to export them to Blogger. If anybody knows I am happy about any kind of help :-)

UPDATE: I am trying out the instructions here:
http://www.ellenshapiro.com/blog/2010/02/so-you-want-to-move-your-comments-from-haloscan-to-blogger/
but I cannot seem to do it. Basically because the instructions are not updated to the programs.
Anybody with a clue that possibly could help me?