Okay ...
after more thought ...
FBReader.app downloaded to system/bin
share folder copied to system
extensions.cfg to system/config
My choice ePub book is "Three Men in a Boat" cos it's good and brilliantly formatted.
Configuration menu now has more options (yeh!) as designed. Page turn on wrist twist not working (yet) ...
Bear with me longer and I'll crack it (I hope) ....
(Still no info on FBReader given in the information box ....

)