Trying to setup home network

I just bought a Linksys WRT54GL wireless router. I have never setup wireless before. Here is my current wired setup. I have a cable modem connected to a netscreen firewall. Off that netscreen firewall I have two laptops that currently plug directly into the netscreens ethernet ports. Both the laptops have their own docking station and I usually have the ethernet go into the back of the docking station. I have the Netscreen do DHCP and give me an address within the 192.168.100.0/24 subnet. I want to setup these two laptops to do wireless and wired. Is it possible to do this and keep them on the same subnet? For instance, if I want to "undock" and move about my office, can I simply connect wirelessly or will it need to be on a different subnet?
If it needs to be on a different subnet, how do I setup my wireless router? I want to physically plug the WAN interface of the wireless router to an dmz port on the firewall, and have that interface on the firewall be the routers default gateway. I'm very confused as to how all this routing will work. I don't want to remove the firewall from the picture, so I need to find a solution that will let me work wired and wireless.
suggestions?

ok, lets forget about the firewall for a moment. I can take the two wired laptops that are currently connected into the firewall and plug them direct into the wireless router. I can then setup the router to hand out dhcp to my laptops. So how do I setup the router settings under the "advanced routing" section of the web gui? Do I put it in router or gateway mode? I would like the firewall to be the default gateway, so how do I get the router to hand out dhcp and forward all packets destined outside the local subnet? and do I create a single dhcp scope that will cover both laptops when they are wired or wireless?
I also don't quite understand how the laptop can have its physical ethernet port be on the same subnet as its wireless adapter? Say I am working on my laptop and have it docked so its hard wired into the router. Wouldn't my wireless card inside the laptop also be trying to connect at the same time? How do they both get an address from the same subnet, or is it not simultaneous?
Message Edited by wags1970 on 06-07-2008 09:21 AM

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