Symptom: If you have a public facing site built on MOSS 2007 you normally would have two zones defined: default zone that is your local intranet and Internet zone that's your public facing zone. In Alternate Access Mapping, you would put something like...

General do not change identity account of application pool that is used by WSS v3 from ISS mgr, change it from WSS admin site if something needs to be accessible to all sites, deploy to _layout\[yourCompanyName] folder get CAML IntelliSense...