Question : DSL router and ISA

Im having problems configuring my ISA server, behind my DSL router.

So before i get to involved in shouting at ISA i just thout i'd check out i'v got my DSL connection setup correctly

My ISP have given me the following addresses

Network IP: 81.*.*.96
Router/Gateway IP: 81.*.*.102
Broadcast IP: 81.*.*.103
Available IPs: 81.*.*.97 - 81.*.*.101
subnetmask: 255.255.255.248

And my DSL router wants to know thease:

WAN Static IP
WAN Subnet Mask
WAN Gateway

Just like to check which Address translates to which setting :)

Im assuming that I can use the NAT on the router to resolved the Static IPs iv been asigned by the ISP to machines (including ISA) on an internal address range, so effectivly a DMZ between the router and ISA?

My intention is to create a structure similer to the method documented here:
http://www.isaserver.org/tutorials/trihomedwirelessdmz.html

with the exception that ISA dosn't have an external interface, it will have to look out through the router.

Answer : DSL router and ISA

Welcome! Tell me if my anw. it helps or if you have some ather questions.