If you are knitting a hat that doesn't have a brim/cuff, this would be an option to the e-wrap cast on method.
Step 1: Forming a slip knot
Step 2: Move the circle over
Step 3: Pull the working yarn through
Step 4: Pull on the yarn tails
Step 6: Insert crochet hook through slip knot
Step 8: Place loop on next peg
Step 9: Continue down the knitting loom
Step 10: How it looks
Step 11: When casting on for a flat panel
Step 12: When knitting in the round:
Knitting loom is threaded and ready to be worked.