migrating from sbs 2000-standard to a new Powedge 2003 sbs Server (New Server)

is it possible to migrate from sbs 2000 server (email , public folders, shared calendars) to a
new sbs 2003 server,  ( new server all together) without having to change any user workstation profiles.
Ideally, i'd like to set the new Server up so all of their shared calendars in outlook 2003 still maintain the same permissions as well as their public folders.

Once all the mailboxes are migrated over, email, public folders..., i want to decommission the old
SBS 2000 DC. Since only One (1) SBS DC can be setup, i will need to decommission the old one.
I am familiar with transferring FSMO roles from a windows 2003 DC to another but not sure if this evan applies in this scenario. Should i simply turn off the old Server or do i need to run DCPromo- even
though its a SBS Server (have no plans on using the old server after the new run is up and running)

Thanks so much.
much ,
Collin