using cable and dial-up at the same time

[marketscope]

Ok I have people pc. When I connected to people pc i recieved ip address: 4.153.******* NOW i connected to hi speed wireless while I was also connected to people pc . My computer showed I am connected to both networks. HOWEVER I then checked my ip again and it is still my people pc ip!
My question is: Is it possible to be connected to people pc and hi speed wireless at the same time and surf ebay using the people pc ip and do research and other things with the wireless ip? If so how do I do this?
It did seem to increase my speed slightly when I connected to the wireless network while being connected to people pc. I am wondering is the ip showed on whatismyip.com without a doubt the ip that ebay will see?

[aspkin]

Well I use VPN, and Highspeed, basically the same as you with a Vista operating system.

What I do is simply switch back and forth between connections, I even use my iphone connection at times and tether in.

You can easily switch back and forth as I'm doing as my connections are always on.

This is with a vista operating system, I know XP is different.