Many changes have been made for Windows Vista to significantly ease deployment, including new out-of-the-box imaging technologies, XML-based migration scripts, new tools for image engineering (ImageX and System Image Manager), and new unattend XML format. Another huge breakthrough with Windows Vista is Hardware Abstraction Layer (HAL) independence and language neutrality; this means that organizations can get to a minimal number of standard images without major efforts to consolidate hardware.
As with any advancement in technologies, getting the maximum benefit requires understanding the tools and technologies. BDD 2007 provides the depth of guidance and tooling to make the Windows Vista and 2007 Office system deployment process predictable and scalable. Many of the tools and guides within BDD 2007 can even be used throughout the desktop management life cycle to provision new users, maintain images, and centrally manage drivers and applications.
BDD 2007 also introduces the new Deployment Workbench, which enables users to build and manage multiple OS configurations, define network deployment points and network shares, inject drivers, attach language packs, and chain applications. It even helps generate ISO and WIM images using Windows PE that can be deployed in a networked environment or using DVDs offline. BDD 2007 also alleviates much of the scripting requirements of previous BDD versions by incorporating a stand-alone task sequencer derived from System Center Configuration Manager 2007. BDD continues to offer the flexibility for Zero Touch Installation with Systems Management Server 2003 and Lite Touch Installation with minimal infrastructure requirements.
Get it all here http://www.microsoft.com/technet/desktopdeployment/default.mspx