Rob Larson has posted some free sample chapters to the Virtual Server 2005 R2 Reskit, inlcuding:

Chapter 4 - Installing Virtual Server 2005 R2 SP1

Chapter 5 - Virtual Server 2005 R2 Advanced Features

Chapter 7 - Best Practices for Configuration and Performance Tuning

Chapter 10 - Virtual Migration Process (using VSMT)

Enjoy.