I need a program which can set up a virtual wireless network on Windows 7 using WEP/Open instead of WPA/2?

I am trying to set up a virtual wireless network connection using Windows 7 and I want to create one which isn't ad-hoc and is open/unencrypted. The device(s) I am using aren't compatible with WPA/WPA2 due to them not being recent and any program I have tried such as Connectify uses WEP with ad-hoc, which also isn't supported. Is there any program available which utilises WEP infrastructure or an open network with Windows 7's VLAN capabilities, or alternatively, is there a way to set up the ICS to do this manually. Any help will be much appreciated.