Welcome late to the party, Phil_C. I told you how easy it was now and that it would be like having a new reader!
I no longer have the Zork version installed, just the basic 2.1.0.2, and the Chess works fine on it, it's located under More > Games. I had a weird issue when I tried Zork so I uninstalled it (can't remember what it was now, but I'm sure it's in back posts in this thread). But I'm sure someone else will come along and help you out with Zork.
Glad to see you joined the PRS+ lovers though.