Moving Users

I am faced with a chalenge this weekend. Where I will install a new server 2003 to replace server 2000. The network consists on 150 users. My major concern would be the end user profiles’ changing.

Proposed Solution: Change user profiles to .dat/ Roaming. Make note of the source of the profile.
Would this work??

If you guys can think of any other problems i will encounter this weekend with solutions Please respond