Change WordPress MU Address

I am working on moving to a new server, but I need to test out our installation before we move it completely over. I have made a duplicate copy of the data and the sql database on the new server, but I need to change the URL for the whole installation (and the blogs) for a while on the test server so I can resolve it.

On regular wordpress you can go into the SQL database and change a couple of entries and it will resolve with the new address. Can we do something similar with wordpress mu? If so, what entries to I need to change?

Thanks for any help you can offer

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    In playing around I found this table on the sql database: wp-site. It has a domain field I can edit.

    I also noticed that each blog has their own wp_1_options table with a siteurl field.

    If I changed each of these (there aren’t that many right now) would everything work?

    Thanks for your thoughts.