Connect wireless router to wireless router

I'm trying to connect two routers to each other so one is an access point and the other is essentially just acting as a wireless card

See this diagram for what I mean. The bit I can't workout is in red
http://img150.imageshack.us/img150/6158/26925190el1.jpg

I'm guessing I need to put the DG into bridged mode and the WAG into client mode. Not entirely sure how though

Can anyone help or provide a pointer (the sharper the point the better)
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edit: Image also here
http://i212.photobucket.com/albums/cc306/janehasabrane/1.jpg
or here
http://farm3.static.flickr.com/2416/1924431160_cbee6f4cc4.jpg?v=0

Edited by GDMT (Thu 08-Nov-07 23:05:11)

in general routers and access points don't come with client modes so you're only likely option is 3rd party firmware where available. I CBA to wait for the image to crawl onto my PC

Thanks