Need to connect to 2 wireless networks simultaneously

Is one for internet and one for network access?

connecting to two separate wireless will not allow you to browse faster since one NIC will be the dominant one.

also they need to have two different IP schemes like 192.168.0.xxx and 192.168.1.xxx

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.
Thanks

Setup 1-st network to x.x.1.x, 2-nd x.x.2.x.
In win cmd > use ip route add
Just type in ip route -- it will give you summary how to use.
Basically what you want to do is tel comp,
that the way to acces x.x.1.x is to use nic1,
and to acces x.x.2.x is to use nic2.
With ip route you'll have to speciffy netmask, network and nic.
As I said -> ip route will clear most of it.
Hope I helped.
Apple314