How Do I Set Up A Wireless Bridge?

I'm assuming 'bridge' is the correct term here.

I have an Orange Livebox wired to the DSL, and two clients which
connect wirelessly to the Livebox.

I have a spare Linksys WAG354G router and I was wondering if it's
possible for that to pick up the Livebox's wireless signal and then
for me to connect, via ethernet, clients to the Linksys router so that
they can connect to the internet through that.

I haven't been able to find any info in the forums or on the Linksys
website and I've no idea what settings to use on the Linksys.