by default the appserver should listen on all ips (0.0.0.0) you can verify this w/ a 'netstat -an | findstr "98" which should show 9840,41 and 9831 at the minimum.
you need to change the dhcp option 211 to point to the admin interface/name
you need to change the LOCATION value to point to the admin interface/name
you need to change the tftp server ip in the 'configurations | provisioning configuration' tab to the admin ip.
you need to make sure your dhcp server is handing out IPs for the admin network - it can hand out both admin and production if you need to, you can optionally bind it to just the admin network interface if you want.
that should be it.