USR8200 with Airport Extreme and a modem - HELP

[totem3]

Hi,
I'm using Apple Airport Extreme with a Modem (Netgear or Linksys) with no problems,
I'm also able to activate the Apple service "Back To My Mac".
Having also an USR8200, i wish to use it as FIREWALL only, connected to the Airport Exreme and the Modem.
How to connect and configure the USR8200 to do this?
Avoiding double NAT and duplicate router issue between Airport Extreme and USR8200.

Thanks for your help.

 

[sturm]

Can you turn off nat on the usr8200 and only use it on the Airport? Never messed with one but you should be able to.

 

[totem3]

Maybe i can use the USR8200 as bridge but i'm confused on how to connect it to the Airport Extreme and how to disable the USR8200 NAT. Any Help?