Hi, I have 2 routers. 
I have one which I've had for ages which is connected to the internet and this computer, lets call that router A.
Now AOL have sent me a new router(B), and soon a PS3, which I would like to connect to the first.
Router A is upstairs and B will be downstairs so that I can connect the PS3 to router B and other things.
How can I connect both routers wirelessly so A can send the internet to B and so B can then send it to the PS3?
A is a ZyXEL Prestige 600
B is a Netgear DG834G
Cheers,

I have one which I've had for ages which is connected to the internet and this computer, lets call that router A.
Now AOL have sent me a new router(B), and soon a PS3, which I would like to connect to the first.
Router A is upstairs and B will be downstairs so that I can connect the PS3 to router B and other things.
How can I connect both routers wirelessly so A can send the internet to B and so B can then send it to the PS3?
A is a ZyXEL Prestige 600
B is a Netgear DG834G
Cheers,