Link aggregation, teaming 2 NICs

I wonder if there is a tool or method for Windows XP to team 2 wireless NICs into one such that the resultant bandwidth is the combined. I have a wireless connection from an AP at our building and have a new 3G USB adapter from a telecom provider that I'll be using temporarily or for outdoors.

The public IPs of each are at totally different ranges. So I don't think this is going to be easy, has any one tried such a thing?

I made a similar post like this in the past. the only difference is that I am using only one live IP with multiple channel from the client to the gateway.

If I am not mistaken the common denominator in our argument is load balancing through diffrent channels, that automatically combines the bandwith, but window dont load balance not sure of linux