The very bottom line of %windir%\System32\eula.txt will tell the XP version.
Paste the following line into Start | Run and click OK...
%windir%\System32\eula.txt
Scroll to the bottom.
Windows XP Home Retail English
EULAID:WX.4_HOM_RTL_EN
Windows XP SP1 Home Retail English
EULAID:XPSP1_RM.1_HOM_RTL_EN
Windows XP SP2 Home Retail English
EULAID:XPSP2_RM.1_HOM_RTL_EN
Windows XP Professional Retail English
EULAID:WX.4_PRO_RTL_EN
Windows XP SP 1 Professional Retail
EULAID:XPSP1_RM.1_PRO_RTL_EN
Windows XP SP 2 Professional Retail
EULAID:XPSP2_RM.0_PRO_RTL_EN
Windows XP Media Center 2005 Retail
EULAID:MCE05_RM.0_PRO_RTL_EN
Windows XP 64-Bit Retail
EULAID:XPSP1_RM.1_P64_RTL_EN
Substitute OEM for RTL for OEM versions.
RTL= Retail
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I think that you need the CD to be able to tell if it was an upgrade version
(CCP).
Volume Label (The name of the disk)
Windows XP CD Volume Labels
I have these three CDs...
Volume Label: VRMPFPP_EN is XP Pro SP2 Retail English
Volume Label: X1APFPP_EN is XP Pro SP1a Retail English
Volume Label: X1AHCCP_EN is XP Home SP1a Upgrade English
Known RTM (SP0) CD Labels (Windows XP) - TACKtech Corp.
http://www.tacktech.com/display.cfm?ttid=226
Known SP1 CD Labels (Windows XP) - TACKtech Corp.
http://www.tacktech.com/display.cfm?ttid=283
Known SP2 CD Labels (Windows XP) - TACKtech Corp.
http://www.tacktech.com/display.cfm?ttid=342
Acronyms and Abbreviations
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CCP Compliance Checking Program (Upgrade Version)
EVL Evaluation Version
FPP Full Packaged Product (Retail Version)
OEM Original Equipment Manufacturer
RTM Release To Manufacturing
Select Select (License for 250 or more PCs)
VLK Volume License (Product) Key
VOL Volume (License)
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Hope this helps. Let us know.
Wes
MS-MVP Windows Shell/User
In