A group of friends and I meet regularly in a building with secured wireless. I don't know any of the details, except that when I connect to the wireless, any attempt to go to a web page redirects me to a login page. I put in my credentials, and then the wireless access is unlocked and I can do whatever I want.
Unfortunately, my friends do not have accounts and are therefore unable to access the internet. Is there any way that I can share my access through ad-hoc mode or something like that? Also, there are ethernet ports, so I may be able to hard-wire into the network and then share access via my wireless card, if such a thing is possible.
Note: I have a Windows XP PC, and one of the other machines is a Mac. I don't imagine they would have any trouble talking to each other or setting up and ad hoc network, but you never know...