Linksys WPC11 and Win98 Fun

I have here an old WPC11 card and an even older P150 laptop running,
of all OS'es, Win98SE. I would like to be able to have different
configurations (encryption keys, etc) for the wireless card so I can use
it in different networks. How can I do that? The configuration utility
that is available off Linksys's website does not seem to be very
helpful. It does let me set up the card for one network but that is it.

Also, I was told there are different versions of this card (v1 to 4).
How can I find out which one mine is?

Finally, how much protection should/could I have in this poor old laptop
(like, should I install a personal firewall?)?

--
Mauricio raub-kudria-com
(if you need to email me, use this address =)