Ted, in Barb's Book, on page 91, it shows the steeking.

If you don't have a page reader I will be willing to talk you through it over the phone or Skype.

Use good quality 100% Polyester thread on Wool Kilts. I like Guttermann. Otherwise match the thread to the fabric in the Kilt for minimum difference in shrinking.

You stitch one pleat to it's neighbor supporting the the creased edge of one pleat to the body of the pleat behind where they overlap. Then move to the next pleat and sew it to the one directly behind. Work all the way across the inside of the Kilt with the Steeking line right below the hip line.
Ted, I know it may be hard for you to perfectly align Tartan stripes but even close is better than no Steeking.
The stitches should be invisible. Don't sew all the way through to the outside of the Kilt when hand stitching.