Cascaded routers as one mega-wifi--network?

Hi,
Right now, I have 3 Cisco/linksys routers linked together in my house.
1) Master (connected to modem)WRT160Nv3
2) WRT54G2
3) WRT54G
As of now, I have them cascaded properly, and they each have their own wi-fi name.
You can acces the internet from any of them, because they are all connected to the WRT160Nv3
Is there any way to make these one big, single wi-fi network, not 3 separate ones? ex, with seamless transitions between routers?

Yes. Set them up as access point. Assuming the WRT160N is still on LAN IP 192.168.1.1 set up the second WRT as follows:
1. Internet connection type to Automatic/DHCP.
2. LAN IP 192.168.1.2
3. Disable DHCP server.
4. Wire one of the LAN ports of the second WRT to a LAN port of the main.
Do the same with the third except choosing 192.168.1.3 for LAN IP address.
For a wireless roaming network, choose identical SSID, wireless encryption, and passphrase. Make sure SSID broadcast is enabled on all WRTs. Choose different channels on each, e.g. 1,6,11 for best performance on all access points.
Good wireless clients should now be able to roam seamlessly between access points. But how well it works depends on the wireless card and the driver implementation. Some drivers will remain connected until the connection is lost and will then reconnect which will result in a brief interruption.

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