This seems unlikely, but is there a way to create a virtual wifi hotspot using Windows 7 that does not involve using Internet Connection Sharing or a wireless network adapter that can support sharing? Like maybe some type of device you can plug into the computer?
This method requires the ICS (internet connection sharing) service to function, not what RHPT wanted, left here only for referance.
There is a DonateWare program called "Virtual Router". Virtual Router will turn any simple Wi-Fi adapter , normally used for the computer side of a connection, into a wireless connection point that can be connected to "securely". http://virtualrouter.codeplex.com/
I have tested this piece of software in Windows 7. It was fun, the version I used was simple and easy.
The wireless device I used was purchased recently, It is a simple USB to Wi-Fi adapter, that would fit in a pocket, it was cheap, it was supported by windows via driver.
This is a simple version of my connection. . Internet---other stuff--MyComputer--VirtualRouter--Wi-Fi Adapter---Portable device. . Using the internet was easy on the portable device. I did not test things that require "direct connect".
It is worth a try, if you know your adapter is supported well by windows 7 , or can purchace a new adapter with the proper windows 7 driver. With one cheap device I could set it up to use Wi-Fi (as designed) on that computer, in a few seconds and a few clicks, I could reverse that in software , and have it Be an available Wi-fi for another computer to connect to. Plus with a click it could be "shut off".
*when I used the word "securely" I dont mean to imply that wireless and wep/wap, or even all aspects of the program are safe from all evils, just that it does use secure, not "open" connections. It defaults specifically to secure connections, and I did not see a way to have it just be Open, even for testing.
There are others out there by TP-Link, etc., but as I haven't tried any before I cannot recommend them.