Question : Migrate imap Linux surgemail to Exchange 2007

We currently have a linux imap server, (Surgemail) and I need to migrate to Exchange 2007, without having to install Exchange 2003 and then upgrade. I am willing to do a manual move, sounds simple enough since we only have about 80 users. My question is; how can I continue to use the imap email server and Exchange side-by-side until I slowly migrate all users to exchange?

Answer : Migrate imap Linux surgemail to Exchange 2007

That's correct. Anyways, that was the best solution to suit your needs, don't you think?