Connecting Software Redundancy to WinCC flexible 2008

Hi Guys! I have two S7-300 PLCs which are redundant using Siemens Software Redundancy and I need to monitor the data of those PLCs in one HMI panel using WinCC flexible.
Since it's a redundant system, for every real input, there are two input in PLC A and PLC B. My question is how can I show the value of two inputs , for example in one I/O field, but in a way when there is problem with PLC A the HMI would be able to read the data from PLC B automatically!

has anyone done such a project before?

This FAQ describes how to connect to a H station. But I think the same methods can be used with software redundancy.
http://support.automation.siemens.com/WW/view/en/23842653

Thanks! I will take a look and see if it can help!