Expert Help on App Pools and the MOSS Install
Application Pools were one of the more confusing items for me when I first encountered them. Here's a great explanation from Joe Oleson in SharePointLand.
The SharePoint Reporter gives us a great list of installation steps here.
This is a pretty comprehensive look at your portal intall. He's set it in the context of a VPC install but much of it is is relevant to any install.
-robot
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