LOTS OF PINS! LOTS AND LOTS OF PINS! LIKE EVERY INCH PINS!
MINKY IS SLIPPERY- ZIPPER TAPES ARE SLIPPERY- LOTS OF PINS
AND TAKE YOUR TIME- DON'T TRY TO PUT IT IN IN A HURRY- SLOW AND STEADY WILL GET THE ZIPPER IN.
good luck--
i managed to do (not too bad) using a fabric glue to hold zipper- but lots and lots of pins and slow sewing did a better job than using the glue.