I have a Dell Precision M6500 laptop with Windows 7 OS.  I am running VM ware and have a Windows XP OS installed that is used for special work application software.  This application is connected to a private network ( No Internet access) with a wired connection.  When I plug a cable into my ethernet port, I can connect to the private network just fine.

I also have access to a separate wireless router that does have access to the Internet.  When I unplug the wired cable, the wireless adapter connects just fine. 

What I want to know is how to set up my PC so it can connect to both the wired and wireless networks at the same time.  This would allow me to do my work on the private network but still allow me to connect to the Internet without disconnecting my wired connection.