This is totally awesome... 

The Microsoft Systems Management Server (SMS) 2003 Operating System Deployment (OSD) Feature Pack (Beta) provides support for SMS to create and deploy images of Windows Operating Systems. The OSD Feature Pack allows the deployment of Windows 2000, Windows XP or Windows 2003 Operating Systems to systems currently running NT 4.0, Windows 2000, Windows XP or Windows 2003 via SMS advertisements or CD based installation.

If you want to see how it works, check out: http://msevents.microsoft.com/CUI/EventDetail.aspx?EventID=1032254841&Culture=en-US