wireless network help!

Okay so here's where im at, i have a wireless internet set up in my house, with one vista pc connected to the router directly, an xp desktop connected wirelessly to the router, an xp laptop connected to the router wirelessly, and a macbook bro connected to the router wirelessly. Wha i want to do is be able to share a folder over the wireless, but i have no idea on how to do this i dont even know where to start. Please if you can give me step by step instructions on how to do so. Please i realy need the help

 

With the windows computers you should just be able to run the Network setup wizard. Then you select which folders to share. Make sure you turn on file and printer sharing when you setup your network.

I don't know how it will work with the Mac.

 

Well... Make sure they are all on the same workgroup, then you have to make sure that your firewall doesnt block the shared folders when you try to access them. Zonealarm is a pain!