Set up Internet Connection Sharing on wireless PC for wired PC clients

Hello there,

I have 3 PC that connect to a switch. One PC has internet connection through an Access Point. I use wifi USB (linksys WUSB54GC)on that PC.

Is it possible to share the internet connection on the PC with wifi USB to another 2 wired PC clients?
And how to set it up?
Any help would be appreciated.