I've found a nice tutorial if anyone else needs to do this...
 Thanks for the help guys.
 http://www.m0n0wallforums.com/showthread.php?t=2

 On 9/16/05, leesharp at hal dash pc dot org <leesharp at hal dash pc dot org> wrote: 
> 
> ----- Original Message -----
> From: "Josh Hyles" <josh dot maillists at gmail dot com>
> Cc: <m0n0wall at lists dot m0n0 dot ch>
> Sent: Friday, September 16, 2005 11:09 AM
> Subject: Re: [m0n0wall] m0n0wall + segmented networks
> 
> 
> > Ok, one last question, how would I bridge the wifi with OPT interface 
> when
> > the linksys router is being plugged into the OPT interface? remember, 
> this
> > is an external router... WRT54G... or maybe I am misunderstanding you.
> > If intefaces are bridged, does that mean they have complete access to 
> each
> > other? or is that where the firewall rules come into play?
> > If i did want to route the wifi(OPT) interface to the WAN, how would I 
> do
> > that?
> 
> Just set the linksys into access point mode. It may be a config in
> the linksys, or just plug into the LAN port in the linksys, not the
> WAN port. Also, turn off DHCP on the linksys if you have it on the
> m0n0 box. (or turn it off on the m0n0 box, just not on both)
> 
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