How to give Global Admin access to user in MOSS 2007

Hi,

After migrating our application from SPS 2003 to MOSS 2007 we are unsuccessful to give Global Admin to access to our application owner of the portal in MOSS 2007.After doing lot of googling finally my senior Ramesh has found that the path to give the access i.e

In the Cental Administration click 'ApplicationManagement' tab there we can see the 'Application security' section.In that click on 'Policy for Web Appliaction'.Now add the user to whom you want to give the Global Admin access for entire Web Appliaction