What is the "windows xp 64 bit 2011 software"? A Windows XP OS copy?
If you want to install XP on the Windows 7, unfortunately, it is not allowed, low version Windows cannot be installed on the high version Windows.
If you want to use XP in Windows 7, please try to use "XP Mode" (Run an XP in the Virtual PC)
Or you could choose the 3rd party virtual machine software to install the XP system on Windows 7.