Can't get past this point. On Serial Monitor, I see:

Initializing Flash Memory...

Determining write/read start point...
Done.

Send 'y' to start read mode. Write mode will begin in 10 seconds...

Now initiating write mode.

Attempting to wake GPS module..

I GPS shield works, for just was using it for another tracker, The Cat Tracker. It of course uses an SD card shield. I substituted the SFI Flash shield. The 2 Includes I'm using are
#include "SoftwareSerial256.h"
#include <SPIMemory.h>
I tried 4800 for GPSBaud speed instead of 9600
The 4 boards are from top to bottom
GPS
USB
Flash
Tiny Duruino

Please help

I already have 4 stacked boards for GPS logger. I would like to start another stack with your special cable that will connect to the WiFi board. It requires a Tinyduino and USB board. Can I use these existing boards from the 1st stack?