Jim,
All the information you are looking for is located within these TWO documents.
Windows Install Guide:
http://service.sap.com/~sapidb/011000358700000171092014E/sbo41sp3_bip_inst_win_en.pdf
Admin Guide:
http://help.sap.com/businessobject/product_guides/sbo41/en/sbo41sp3_bip_admin_en.pdf
You 3-tier should include:
1st Servers:
- Database Servers
- CMS database
- Audit Database
- Corporate / Reporting Database
2nd Server:
- Web Tier
- Java Application Servers - Tomcat Servers
- Web Server integration / Bridge with Tomcat (OPTIONAL)
3rd Server:
- SAP BI 4.1x Platform Server
4th Server (Cluster Optional)
- SAP BI 4.1x Platform Cluster Server
Regards,
Ajay