Two great links for Microsoft SQL Server 2000 Index Defragmentation Best Practices and Automatic Reindexing.

These links provides information that you can use to determine whether you should defragment indexes to benefit the workload performance in your production environment. And how...

http://www.microsoft.com/technet/prodtechnol/sql/2000/maintain/ss2kidbp.mspx

http://www.sqlmag.com/Articles/ArticleID/43783/pg/2/2.html