Here's some SQL that'll query computers with MS Office 2003 without the Office 2007 compatibility pack. Just go to reports, create a new one, and select 'Enter SQL Directly', then copy and paste the sql into there.
SELECT T0.[Domain] AS 'Domain', T0.[Name] AS 'Name', T0.[OS Name] AS 'OS Name', T1.[Name] AS 'Name' FROM [Inv_AeX_AC_Identification] T0 INNER JOIN [Inv_AeX_OS_Add_Remove_Programs] T1 ON T0.[_ResourceGuid] = T1.[_ResourceGuid] WHERE T1.[Name] LIKE 'Microsoft Office%' AND T1.[Name] LIKE '%Edition 2003%' AND T0.[Name] NOT IN (SELECT T0.[Name] AS 'Name' FROM [Inv_AeX_AC_Identification] T0 INNER JOIN [Inv_AeX_OS_Add_Remove_Programs] T1 ON T0.[_ResourceGuid] = T1.[_ResourceGuid] WHERE T1.[Name] LIKE 'Compatibility Pack for the 2007 Office system')