I made this scarf a few months ago with a chunky alpaca yarn from A.C. Moore and I absolutely it. I wear it often! I never found a video online for the I-cord cast on and wasn't sure at first if I was doing it right. But, like Ingrid says, "Trust the pattern!" It'll turn out.
"M1 by knitting 2 sts into 1st stitch" means [color=blue]kfb[/color]. It's a Bar Increase.
- Cast on three stitches using the cable or knitted cast on. Don't use the Long Tail cast on because it'll be too thick.
- Slide these 3 stitches purlwise back onto left needle.
- kfb the first stitch, then knit the next 2 stitches. You should now have 4 stitches on the right needle.
- Repeat the following pattern: [Slip the last 3 sts from the right needle to the left needle, kfb the 1st stitch, then knit 2 stitches].
So, you're sliding 3 sts, working these 3 sts which result in 4 sts. This is how you will get additional stitches --one at a time-- while casting on.
- Repeat between the  until you have 38 stitches (36 + 2 additional stitches).
- When you "Slip last 3 sts from RH needle to LH needle, K2tog, K1" you'll then have 37 sts remaining.
- After "Slip last 2 sts from RH needle to LH needle, K2tog" you'll finally have the 36 sts cast on that you need.
- The directions on the backside say to now purl the next row which is the backside or WS of the scarf.
[color=violet]Here are my tips after having made this scarf:[/color]
1. The cast on can get tight and you might find yourself frogging it a few times to get the right look when you get the hang of it.
2. The slip stitch double knit edge is pretty, but expect it to look not exactly like the I-cord cast on or bind off.
3. The directions say to repeat the chart 16 times. 16 is not enough repeats if you want a normal length scarf. Mine turned out to barely cross the top of my chest. So... do as many repeats as YOU think looks good. Just remember to use the same number of repeats on the other end of the scarf after you've finished the neck ribbing.
4. Check to see if 9" of neck ribbing is enough for you. Again, you'll have to eye it.
5. The I-cord cast off directions given are the fastest way to do it. If you want to see a variation, look in Nancie Wiseman's The Knitter's Book of Finishing Techniques pp 56-57. She replaces the K2togLS with SSK.
6. FYI: The LS in K2togLS means left slant and therefore through back loops instead of front loops. Also, if she says to do a K2 tog-LS, she means tbl (through back loop). I didn't do it this way because that twists the sts. I instead did SSK.