Safest and Most Efficient Way of Moving Terminal Services CALs from Windows Server 2003 Standard Edition to WIndows Server 2008 Enterprise Server

Dear experts,

I have a task to move existing terminal services CALs from a Windows Server 2003 (Standard Edition) license server to an existing Windows Server 2008 Enterprise.

I saw this knowledgebase online --> http://support.microsoft.com/kb/953918 ...but would like to hear your expert opinion and advises as I don't want surprises because this is my first time to do it. Also are there any backup steps just in case I need to revert back?

Specs:
Need to Retire Server 2003 Licensing Server and has:
-- existing windows 2000 server terminal services cal token (per device) --> unlimited
-- temporary licenses for windows server 2003 - terminal server per device --> all used up
-- windows server 2003 --> volume license total 250, available 245
-- windows server 2003 --> volume license total 10, all used up

Moving onto existing 2008 Licensing Server and has:
-- existing windows 2000 server terminal services cal token (per device) --> unlimited
-- temporary licenses for windows server 2003 - terminal server per device --> all used up
-- windows server 2008 per device --> volume license total 20, available 20
-- windows server 2008 per device --> volume license total 10, available 10
-- windows server 2008 per device --> volume license total 1250, available 70

Thank you!