How to install E9.05 with seperate App Server

I want to lean towards setting up E9.05 to use a cluster of App Servers, so I want to set it up initially with one, and then can expand to more.

Would I install the OpenEdge stuff on the "App Server" and then the Epicor Server Software on the "E9" Server? If so, how do you tell the "E9" Server to use the "App Server".

What steps would I use to install fresh with seperated Epicor Server and OE App Server.

Regards,

George Hicks