How do I retrieve the Win XP sp3 Product Key from the Registry?

I have read here that the Product Key is in the Registry.  How do I retrieve it?

Diagnostic Report (1.9.0027.0):

Windows Validation Data-->

Validation Status: Genuine

Validation Code: 0

Cached Validation Code: N/A

Windows Product Key: *****-*****-3G8RC-R939K-KKFM9   >>>>>>>>>>>>>>>>> IT WOULD BE NICE IF THE COMPLETE KEY WERE HERE!!

Windows Product Key Hash: rPtjq7V+kTmlOVtH3vlDV3k3wvA=

Windows Product ID: 55276-010-0743151-22904

Windows Product ID Type: 5

Windows License Type: Retail

Windows OS version: 5.1.2600.2.00010100.3.0.pro

ID: {6F16DD56-CC29-4742-92F4-8F2DCD6AB1B0}(3)

Is Admin: Yes

TestCab: 0x0

LegitcheckControl ActiveX: Registered, 1.9.40.0

Signed By: Microsoft

Product Name: N/A

Architecture: N/A

Build lab: N/A

TTS Error: N/A

Validation Diagnostic: 025D1FF3-364-80004002_025D1FF3-229-80004002_025D1FF3-230-1_025D1FF3-238-2

Resolution Status: N/A

Vista WgaER Data-->

ThreatID(s): N/A

Version: N/A

Windows XP Notifications Data-->

Cached Result: 0

File Exists: Yes

Version: 1.9.40.0

WgaTray.exe Signed By: Microsoft

WgaLogon.dll Signed By: Microsoft

OGA Notifications Data-->

Cached Result: N/A, hr = 0x80070002

Version: 2.0.48.0

OGAExec.exe Signed By: Microsoft

OGAAddin.dll Signed By: Microsoft

OGA Data-->

Office Status: 109 N/A

OGA Version: Registered, 2.0.48.0

Signed By: Microsoft

Office Diagnostics: 025D1FF3-364-80004002_025D1FF3-229-80004002_025D1FF3-230-1_025D1FF3-238-2

Browser Data-->

Proxy settings: N/A

User Agent: Mozilla/4.0 (compatible; MSIE 8.0; Win32)

Default Browser: D:\MOZILLA FIREFOX BETA\firefox.exe

Download signed ActiveX controls: Prompt

Download unsigned ActiveX controls: Disabled

Run ActiveX controls and plug-ins: Allowed

Initialize and script ActiveX controls not marked as safe: Disabled

Allow scripting of Internet Explorer Webbrowser control: Disabled

Active scripting: Allowed

Script ActiveX controls marked as safe for scripting: Allowed

File Scan Data-->

Other data-->

Office Details: <GenuineResults><MachineData><UGUID>{6F16DD56-CC29-4742-92F4-8F2DCD6AB1B0}</UGUID><Version>1.9.0027.0</Version><OS>5.1.2600.2.00010100.3.0.pro</OS><Architecture>x32</Architecture><PKey>*****-*****-*****-*****-KKFM9</PKey><PID>55276-010-0743151-22904</PID><PIDType>5</PIDType><SID>S-1-5-21-725345543-1284227242-2146778517</SID><SYSTEM/><BIOS/><HWID>E0DD389F01848773</HWID><UserLCID>0409</UserLCID><SystemLCID>0409</SystemLCID><TimeZone>US Eastern Standard Time(GMT-05:00)</TimeZone><iJoin>0</iJoin><SBID><stat>3</stat><msppid></msppid><name></name><model></model></SBID><OEM/><GANotification><File Name="WgaTray.exe" Version="1.9.40.0"/><File Name="WgaLogon.dll" Version="1.9.40.0"/><File Name="OGAAddin.dll" Version="2.0.48.0"/></GANotification></MachineData><Software><Office><Result>109</Result><Products/><Applications/></Office></Software></GenuineResults> 

Licensing Data-->

N/A

Windows Activation Technologies-->

N/A

HWID Data-->

N/A

OEM Activation 1.0 Data-->

BIOS string matches: yes

Marker string from BIOS: 1BFE3:GENUINE C&C INC

Marker string from OEMBIOS.DAT: N/A, hr = 0x80004005

OEM Activation 2.0 Data-->

N/A