I bought the EDT 128x64 graphics LCD display module, I also got its data sheet for a project but didn't have time to take a look at it yet.
If you find code for it great, if you don't then write your own code for it and make it into library with functions like:
line, circle, filled circle, rectangle and filled rectangle, triangle and filled triangle, polygon and filled polygon. clear screen, disptext, etc.
Regards
Mahmood