SBS2003 ready for migration ? Am I on SP1 ?

I need to migrate to SBS2011, I read from Dematzer notes that SBS2003 SP1 must be applied. Although I have all Windows updates installed, currently am runing Windows 2003 for SBS SP2 (from My computer), and Exchange SP2 (cheked from System Manager), I still cannot find that I am well running on SBS2003 SP1. I cannot see the reg entry as below. Is there any other way to check / confirm that I have SP1.

Thanks, Cliford

•Windows Small Business Server Service Pack 1 - verify this by checking the registry key HKEY_LOCAL_MACHINE\Software\Microsoft\SmallBusinessServer\ServicePackNumber you are looking for a value of 1 in the bracket.
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Glen KnightCommented:
If that value is not there you are not runnin SBs SP1

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