Firewall/NAT

HI to all and sorry for my English,

i'm newbie in m0n0wall usage and i "met" it during my search for a fast replacement (for some week) of damaged appliance.

This my network schema

LAN Server & Workstation <-> Appliance damaged <-> DMZ Server<-> ISA 2006 <-> Internet

my goal with m0n0wall (damaged appliance performed this work):

1) A group of PC in LAN can access to server in DMZ and to Internet with NAT and therefore with "public ip" of m0n0wall

2) Some server in DMZ must access to server in LAN using "public ip" of m0n0wall.

3) Some server in DMZ must access to server in LAN using own LAN ip address e not using "public ip" of m0n0wall or another m0n0wall "public ip"

After some test i understand that point 1 and 2 are "normal point", but i find nothing for point 3.

I hope to be clear.

Can someone help me?

Thanks in advanced.

Kind regards.

Massimo.