Configure your router with a wired connection first get that working then configure the wireless.

Your PC must have a configured Ethernet Connection.

Setup your network on the PC with Windows XP, Network Setup Wizard. Go... My Computer -> Control Panel -> Network Setup Wizard -> Next -> Next -> This computer connects to the internet through a residential gateway

Thanks for everyone's replies.

I can't do it, I want to know it's done properly.
I've had 2 quotes, one at

You know it makes sense!