Here is a quick script to determine the modules you are using and in which portals. You can run this in the Host|SQL module or download the free SQLView module and plunk it on your own admin page.
SELECT dbo.DesktopModules.FriendlyName, dbo.Portals.PortalName, count(*) [Times Used]
FROM dbo.Modules INNER JOIN
dbo.Portals ON dbo.Modules.PortalID = dbo.Portals.PortalID INNER JOIN
dbo.ModuleDefinitions ON dbo.Modules.ModuleDefID = dbo.ModuleDefinitions.ModuleDefID INNER JOIN
dbo.TabModules ON dbo.Modules.ModuleID = dbo.TabModules.ModuleID INNER JOIN
dbo.DesktopModules ON dbo.ModuleDefinitions.DesktopModuleID = dbo.DesktopModules.DesktopModuleID
WHERE
-- filter out deleted modules
(dbo.Modules.IsDeleted = 0)
and
-- filter out the admin modules
(dbo.DesktopModules.IsAdmin = 0)
GROUP BY dbo.DesktopModules.FriendlyName, dbo.Portals.PortalName
SELECT dbo.DesktopModules.FriendlyName, dbo.Portals.PortalName, count(*) [Times Used]
FROM dbo.Modules INNER JOIN
dbo.Portals ON dbo.Modules.PortalID = dbo.Portals.PortalID INNER JOIN
dbo.ModuleDefinitions ON dbo.Modules.ModuleDefID = dbo.ModuleDefinitions.ModuleDefID INNER JOIN
dbo.TabModules ON dbo.Modules.ModuleID = dbo.TabModules.ModuleID INNER JOIN
dbo.DesktopModules ON dbo.ModuleDefinitions.DesktopModuleID = dbo.DesktopModules.DesktopModuleID
WHERE
-- filter out deleted modules
(dbo.Modules.IsDeleted = 0)
and
-- filter out the admin modules
(dbo.DesktopModules.IsAdmin = 0)
GROUP BY dbo.DesktopModules.FriendlyName, dbo.Portals.PortalName