Replacing 2003 DC with 2008 DC - FSMO Roles

Hi all

I am currently in the process of replacing a DC at a remote site. For the purposes of this example, we'll use the following names:

DC1 - Windows 2003 Standard (Current DC at remote location)
DC2 - Windows 2008 R2 Standard (New DC)

We only require one domain controller in this remote office, so this is a straight swap due to DC1 having very old hardware and needing to be decommissioned.

DC2 has been added to the network as a domain controller and I have synchronised DNS, and it's already running DHCP for the machines in the office.

I'm now at the point where I want to do the final pieces of the puzzle to get DC2 running on it's own, and I know that the FSMO roles need to be moved over to the new machine.

Could anyone please assist me with this, as it's been a long time since I've gone through this process with a DC migration. I want to make sure I don't miss anything, and I'd like to know about any 'gotchas' along the way, prior to conducting the migration.

Many thanks in advance for your advice

Ian