Change the "Earlier version of windows" in VISTA

• Boot Windows Vista and Open Command Prompt
• Type bcdedit

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C:\> bcdedit

Windows Boot Manager
--------------------
identifier {bootmgr}
device partition=C:
description Windows Boot Manager
locale en-US
inherit {globalsettings}
default {current}
displayorder {ntldr}
{current}
toolsdisplayorder {memdiag}
timeout 30

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

Windows Boot Loader
-------------------
identifier {current}
device partition=D:
path \Windows\system32\winload.exe
description Microsoft Windows Vista
locale en-US
inherit {bootloadersettings}
osdevice partition=D:
systemroot \Windows
resumeobject {1ecfd635-a8ea-11db-bb9b-ddf07c6aaff1}
nx OptIn
==========================================================================

• To change "Earlier version of windows" to "Windows XP Professional" or any other desire name
  
• Type bcdedit /set {ntldr} description "Windows XP Professional"

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C:\> bcdedit /set {ntldr} description "Windows XP Professional"
The operation completed successfully.
==========================================================================

• To change Windows XP as boot default
• Type bcdedit /set {bootmgr} default "{ntldr}"

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C:\> bcdedit /set {bootmgr} default "{ntldr}"
The operation completed successfully.
==========================================================================

• Type bcdedit to check on changes made

==========================================================================
C:\> bcdedit

Windows Boot Manager
--------------------
identifier {bootmgr}
device partition=C:
description Windows Boot Manager
locale en-US
inherit {globalsettings}
default {ntldr}
displayorder {ntldr}
{current}
toolsdisplayorder {memdiag}
timeout 30

Windows Legacy OS Loader
------------------------
identifier {ntldr}
device partition=C:
path \ntldr
description Windows XP Professional

Windows Boot Loader
-------------------
identifier {current}
device partition=D:
path \Windows\system32\winload.exe
description Microsoft Windows Vista
locale en-US
inherit {bootloadersettings}
osdevice partition=D:
systemroot \Windows
resumeobject {1ecfd635-a8ea-11db-bb9b-ddf07c6aaff1}
nx OptIn
==========================================================================