How to slipstream SQL Server 2005's Books Online Update

1. Delete the original ...\SQL Server x86\Tools\Setup\SqlServer2K5_BOL.msi
2. Rename the downloaded SqlServer2K5_BOL_Jul2006_v2.msi (or whatever the latest version is) to SqlServer2K5_BOL.msi and copy it to the ...\SQL Server x86\Tools\Setup folder.
3. Run setup.

Thanks to John Paul Cook, a SQL Server MVP out of Houston, TX, for pointing this out. John Paul Cook always has interesting articles/ideas about SQL Server - I suggest you Google his name and read some of his articles. Thanks, John :)