Want Dual operating system in windows 7?

Hi...friends if u want dual OS then install 1 OS in C: then 2nd OS in E:

then follow below steps:




Run cmd as administrator and type bcdedit  

Windows Boot Manager
    --------------------
    identifier {bootmgr}
    device partition=\Device\HarddiskVolume1
    description Windows Boot Manager
    locale en-US
    inherit {globalsettings}
    default {current}
    resumeobject {07cf7f57-e206-11dd-a0c8-bab28362099d}
    displayorder {ntldr}
    {current}
    toolsdisplayorder {memdiag}
    timeout 30

    Windows Legacy OS Loader
    ------------------------
    identifier {ntldr}
    device partition=\Device\HarddiskVolume1
    path \ntldr
    description Earlier Version of Windows

    Windows Boot Loader
    -------------------
    identifier {current}
    device partition=C:
    path \Windows\system32\winload.exe
    description Windows 7
    locale en-US
    inherit {bootloadersettings}
    recoverysequence {07cf7f59-e206-11dd-a0c8-bab28362099d}
    recoveryenabled Yes
    osdevice partition=C:
    systemroot \Windows
    resumeobject {07cf7f57-e206-11dd-a0c8-bab28362099d}
    nx OptIn

I want to change the "Windows 7" description to "Windows 7 Ultimate X64 beta" so I type..
1
2

bcdedit /set {current} description "Windows 7 Ultimate X64 beta"