Hey there,
I gave the cab a try, but it installs the new version of bing, specifically 5.1.2010.6280, not classic style 4.6.9179.1.
Still, thank you for giving it your attention! I still hope we can find a solution since Microsoft has given us the shaft and ignored all of our requests here:
Bing: Don't like new version; won't let me use old version!