To list all x64 XP computers with SP2, please use the following report:
Select Top 1000000 tblComputers.Computername, tblComputers.ComputerUnique,
tblComputers.Domain, Web40OSName.OSname, tblOperatingsystem.Description,
tblOperatingsystem.ServicePackMajorVersion As [Current SP],
tblComputers.Lastseen, Web40OSName.Compimage As icon
From tblOperatingsystem Inner Join
tblComputers On tblOperatingsystem.Computername = tblComputers.Computername
Inner Join
web40ActiveComputers On tblComputers.Computername =
web40ActiveComputers.Computername Inner Join
Web40OSName On Web40OSName.Computername = tblComputers.Computername
Where Web40OSName.OSname = 'Win XP' And
tblOperatingsystem.ServicePackMajorVersion = '2' And Web40OSName.OScode =
'5.2.3790'
Order By tblComputers.Computer
It's not possible to include this report in the OS list at the top of your report dashboard though.