The original document suggested to use Sesame Street: Alphabet Avenue as donor cart and pointed out to use an „Assembled in Mexico“ cartridge. As you can see a regular US cartridge won’t do the trick.
I’ve found an alternative cart, Math Antics with Disney’s 101 Dalmatians will work just fine (if assembled in Mexico).
Update: Found two more suitable carts.
This cart needs some cleaning:
Remove the chip and replace it with a 42-pin socket and one or more M27C322 EPROMs, also move the resistor from J2 to J1.
Before flashing a ROM file make sure it is byte-swapped, i.e. the copyright info reads ESAG instead of SEGA.
I’ve removed the back cover label with the help of a hair dryer and attached the PCB with hot glue for now (in the original document a hole was cut through the back cover).
As for the book pages, you’ll have to find them at the usual places (e.g. here or here) and print them out.