Dave Little (VERITAS) and I co-authored the book "implementing backup and recovery", we include in the back of the book two sections:
1. Business Impact Analysis Planning Kit
2. DR Planning Kit.
while not exhaustive, they do provide a good solid basis from which to build. You can order the book from the VERITAS site here, http://www.backupscriptsc.com or Amazon.com if you are interested.
Keep in mind the level of the disaster you are planning for. Disasters can cover many different areas. If you haven't already done so, conductig a Business Impact Analysis will help you manage the risk based on your business objectives.
David A. Chapa
Elovate
Managing Partner, CTO
Co-Author, Implementing Backup and Recovery