Besides Sachin's guide, I'm also reviewing book "Microsoft SQL Server 2005 Unleashed" (SAMS pub) for the proper upgrade path, and find the information about Fulltext indexes conflicting.
While Sachin states Fulltext indexes should be completely removed before upgrading and recreated, the Unleashed text states these are taken care of in both Side-by-Side and In-Place upgrades:
From page 208 for Side-by_Side: "You might be wondering how the [Copy Database] wizard handles your full-text catalogs. Rest assured, they are imported by default during either a restore, an attach, or via the Copy Database Wizard..."
From page 217 for In-Place: "...When your upgrade of the database engine is complete, it is recommended that you perform the following on all databases (also recommended for side-by-side migration): -Repopulate your full-text catalogs. (This is automatically done for databases where Full-Text indexing was enabled prior to the upgrade.)..."
I did not find any reference in the Unleashed text about removing the full-text indexes prior upgrading at all.
Thanks for your replies. Great article by the way.