I have a Linksys WRT54G2 wireless router that is used in an office setting. We have, of course, set a password to access (wireless) the internet and local file sharing network from a laptop. Occasionally, however, we have guests that want to access the internet. Is it possible to give the guest a temporary password that is different than the main one? Also, is it possible to limit the guest to only the internet and not the local file sharing network?