WelI, I managed to get it working by finding two Netgear WDS capable devices but the performance was so bad my customer decided to stick with what they had.
You can provide a wireless to wireless link to extend your network range but you have to hunt for the right equipment and it isnt very good when you get it working.
a) DG834GT began to support WDS as of firmware 1.02.14, but this has gone from later releases
b) Other routers support WDS on a random basis
c) Business APs support WDS but SOHOs do not.
d) Netgear business support is a lot better than SOHO and is permanent - not just 1yr from purchase. (Hi - I'd like to but some more kit to connect to my existing router - "I'm sorry; I can't help you").
I eventually got the DG834N router and WG102 AP to talk but you have to drop from 270/108mbps to standard 54G with WEP only, so any advantage gained by extending the coverage is spoiled by loss of 'extended' features/range available in the DG834N.
In summary, don't bother. If you want to create a large wireless network, position your (business class) APs at strategic points to achieve the desired coverage and CONNECT EACH AP VIA CABLE to your modem router.