Setting up apache and apppserver one one machine

Hi i had the following questions regarding setting up apache in the
following config

Config should be something like this

Linux box with two network cards
one network card for serving web traffic other one for internal
network both connected to a router via a switch

Web server (apache) serving multiple domains;
Application server (two app servers mostly ) setup running various web
service(to be aced via soap) on the same machine.
This is going to mainly used as a testbed
How should i set these things up on the apache
Please some body help me as i a newbie