I knew I should have been more explicit.....
Internet access is not part of the question. I just need to simultaneously connect to separate intranets
I understand that the addresses on the intranets will have to be disjoint.
I do not need workarounds like bridging the intranets, etc.
I really just need to know how to (in Windows XP, Vista, 7) actually connect to 2 wireless intranets at the same time, one intranet per wireless adapter.