This post looks a bit strange, but what issue are you running into with the PiFace control and display 2 with the RasPi B+?
I've used this in the past for another project and it seemed to work fine after being set-up properly.
From the element14 product page, there are a number of Blog posts and info on how to set this up.
The PiFace web site has info and code for using this. (See the bottom of the page)
What is it that you are having problems with?