FRA is a large and badly planned airport but if you can navigate your way around LHR you shouldn't have any problem finding your way around FRA. I have tried to find suitable photos of FRA out of my collection of 500+ on flickr but some are out-dated and do not mention anything about Z gates. More recent ones were taken outside security as I started exploring parts of FRA I hadn't seen before.

If you are interested here is my collection. You will see at least that there are plenty of signs to guide you.