If you have already downloaded and installed Windows 7 RC then you can use new Windows 7 feature “Windows XP Mode” from today. Note that your processor has to have hardware virtualization technology to run Windows XP Mode for Windows 7.
How to Install Windows XP Mode in Windows 7 RC?

Download the Windows Virtual PC Beta …

As expected, early morning today Microsoft has announced the availability of Windows 7 RC to the public. Windows 7 RC is available for download in 32-bit as well as 64-bit from today till July 2009.
However when you will proceed for Windows 7 RC Download Page on Microsoft website you need to login with your Windows …