This is the best software for what you need it is called Connectix Virtual PC For Windows it is a powerful cross-platform compatibility solution that enables a single PC to run combinations of PC-based operating systems simultaneously. Virtual PC makes switching operating sytems as easy as switching applications and provides much needed flexibility to the PC.With Virtual PC, companies can upgrade to a new operating system and continue to run legacy applications that are incompatible with the new system. IS professionals can "sandbox" a potential deployment by testing it against any combination of operating systems and applications in a safe, encapsulated environment. Software developers and QA specialists can develop, test and debug software for different operating systems on one computer. Technical Support staff can easily create multiple user-specific configurations on a single PC for real-time scenario testing and evaluation.
HOST Operating Systems
Runs on Microsoft Windows XP Professional, Windows XP Home, Windows 2000 Professional, Windows NT 4.0 w/ svc pk 6+, and Windows Me.
GUEST Operating Systems
Supports Microsoft Windows operating systems including Windows 3.1, Windows 95, Windows NT 4.0 Workstation, Windows NT Server, Windows NT Enterprise, Windows 98, Windows Me, Windows 2000. I hope this helps if you need a url for more ifo use this http://www.connectix.com/products/vpc4w.html