You can get them at http://www.microsoft.com/downloads/details.aspx?familyid=aec18337-887f-4ec6-a858-81f84de8082f&displaylang=en. These are the labs that the SQL Server escalation engineers were using to illustrate troubleshooting techniques at the PSS Service Center at PASS. Per the download page:
“All labs are documented so that users can work through different scenarios in a self-study environment. These labs cover popular topics such as blocking, performance, memory, and debugging, and data recovery. They include hands-on usage of the PSS tools: READ80TRACE, OSTRESS, and PSSDiag.”
There's a whole lot of valuable material here - download & dig in.