Wireless Cards Routing

[Neptune1]

I have a Wireless card in my laptop running XP Pro and a Wireless PCI card in my Main Win XP Pro PC, used as a gateway.
I can access the internet and access the Main pc.
I have 2 other PC's connected to a switch on the network.
Is there a way to set up the network so I can see the other PC's using the cards that I have.
Or do I have to get a Access point to do this

Thanks!!

I would think that you could do it using the wireless in the main machine and using the main machine as a router for the laptop. But it would be easiest to purchase a WAP and plug it into your switch. Plus you can expand with more wireless more easily afterwards.