Deployment has a new tool in Windows 7: DISM (Deployment Image Servicing and Management). DISM is a command line tool which can be used to service a Windows® image or to prepare a Windows Preinstallation Environment (Windows PE) image. It replaces Package Manager (pkgmgr.exe), PEimg, and Intlcfg that were included in Windows Vista®.
Hence, Now one tool does it all ! ! !

DISM can be used to service Windows Vista® with Service Pack 1 (SP1) and Windows Server® 2008 and provides the same functionality that Package Manager provided. DISM provides additional functionality when used with Windows® 7 and Windows Server® 2008 R2.

In addition to replacing three previously released tools, DISM also supports more features and functionality than the other tools (most notably Package Manager) supported in Windows Vista, including logging, inventory commands with parse-able output, detailed help, offline INF driver package installation, direct application of MS update packages, and integration of international settings.