Driving Graphics LCD or OLED from PIC microcontroller

Hello,

I am using a PIC16F1829 to drive a Winstar OLED display type WEH001601A, which is a
16×1 character display.  Using the LCD Functions on the electroSome website, I have
got this working very nicely.  (Although OLED, they are driven in the same way as LCD.)

I now want to try using a Winstar WEG010016 display; this is a graphics display with
100×16 pixels.  It’s datasheet seems to be very similar to WEH001601A, but information
on using it in graphics mode is limited and confusing.  I wonder if you have any help
on this topic at electroSome?  Some example code would get me started on the right path.
I have tried hacking around with commands and data, but with no success. Pixels light up
OK, but the display is garbage.

Many thanks for any advice you can offer,    Ken.