I really don’t want to sound harsh here, but you are *not ready* to migrate to SPS 2003.
One of the large problems in learning 2003 is *unlearning* 2001 concepts. About the only similarity between 2001 and 2003 is the name and some of the search components. If you don’t understand the 2003 concepts and if you have not mapped out your taxonomy for 2003 using 2003 features and components, then your migration *will* fail. You are *much* better off to wait 4-6 months, get some training, run a pilot of 2003, etc….. and then migrate. I *seriously* advise against a migration for you until you have a good working understanding of SPS 2003.