WordPress MU

I've set up MU for on an instant access domain with the intention of changing the url once DNS was updated. This is easy for regular Wordpress, however it appears to be more complicated and risky for MU. I've found some relevant info. This appears to be a rather complex solution: http://codex.wordpress.org/Changing_The_Site_URL while this plugin appears not to be available: http://wpmudevorg.wordpress.com/project/Multi-Site-Manager/download

Does anyone know about the availability of this plugin or other possible solutions to my problem?

Do a find & replace on the db.

FYI: That can have harsh consequences on occasion, especially if the domain is part of a serialized array.

True, true.

I can;t remember my point any more. :D

Thanks.

@lunabyte. Could you please elaborate. How do I know if the domain is part of a serialized array? This is the domain, currently three pages:
http://www.strommen-if.no
http://www.strommen-if.no/alaget
http://www.strommen-if.no/intern

I suppose the site should be placed in maintenance mode and db downloaded, changed, then uploaded?

I've done a search and replace of the sql-file. Updated config.php accordingly. Everything appears to have been successful. The sql-file was download and restored with WP-DBManager, config.php was updated after the db was changed.