Thanks for the info, I tried the easy_e17 script (installing to /opt) and managed to install the following libraries:-
Eina Eet Evas Ecore Efreet Embryo and Edje, but the E_DBus threw up so many errors I gave up, I was almost there.!!!
Anyway, I have since written a quick bash script, which successfully created the edj files for 2600 photos. The clever thing about
E17 is the edj files are only 5.9KB each and also resize my photos to fit the screen. They are just pointers, so the original photos remain untouched in the original directory. If anyone is interested I can post the bash script.