Have a look in;
\SUPPORT\TOOLS\SUPPORT.CAB
on your Windows 2000 install CD-Rom
Here: W2K,SP4 + SupportTools(SP4)
C:\Program Files\Support Tools
2002-04-19 15:46 140,096 comdlg32.ocx
comdlg32.ocx is version 6.0.81.69 (6.08169)
Directory of C:\WINNT\system32
1999-05-07 06:24 140,288 comdlg32.ocx
comdlg32.ocx is version 6.0.84.18 (6.08418)
SUPPORT.CAB (W2K, SP0)
1999-08-19 10:07 140,096 comdlg32.ocx
comdlg32.ocx is version 6.0.81.69 (6.08169)
....who knows...
Just For Reference.