Here are some examples that should help to get you started.http://www.voodoolab.com/gcxdiagrams/05 ... tching.pdf
In this diagram GCX Loops 1-3 are controlling pedals that are routed to the front end of the amp. I assume that you will keep the wah out on the floor so I am unsure if this part is of much concern to you.
GCX Loop 4 is being used to switch a device that is routed to a parallel effect loop. You would connect the Flashback the same way using any unused GCX Loop routed to the parallel effects loop on your amp.http://www.voodoolab.com/gcxdiagrams/01 ... _AmpSw.pdf
In this diagram GCX Loops 5 and 6 are controlling two devices that are routed through a series effects loop. You would simply use four unused GCX Loops to connect your four pedals and route them through the series effects loop on your amp.
I hope this helps!