I have rmoved my test exchange except for Mailbox roles - Can i re-run setup and strat my installation again?

This si going to be a migration from Ex2003 to ex2010 I ran into problems the first time and had to remove almost the entire server.  I still see a Administrative group on my ex2003 server, and I am able to see all the mail boxes on the 2010 server that are going to be migrated.  Is there a special way I need to re-run the installation? so that I do not mess up the AD on my other exchange server?
Scott JohnstonIT Manager Asked:
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SeanSystem EngineerCommented:
Nope you should be able to just rerun it.
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Scott JohnstonIT Manager Author Commented:
Bonus Points...it is installing right now it seems to working perfectly.  Next is to migrate.
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