wireless GPO and networking

I would like to deploy a wireless GPO to my wireless users in an Active
Directory environment, using radius but not certificate services.

If someone can share a link on how to deploy an automatic configuration to
wireless Windows XP SP 2 clients that would be great

I also would like to know if a non domain window XP SP 2 computer comes
into the wireless radius environment how does Windows know it's not an
Active
Directory domain member?

I understand that computers can perform the authentication but does that
mean that for a split minute the non domain windows XP SP 2 computer
actually
got on the network to try and authenticate?

Thank you,

John