I don't have specific comments to help, but Fred's (SOMA's) drawing should help a lot. If you still have problems, I have a Nacra manual I could scan and e-mail you. I assume there are enough simularities that it would help. I won't post it because of copyright issues.

I remember when I got a Nacra after having Hobie 16's. I could not figure out how to raise the main sail. On the H-16, the Halyard line that pulls up the mast runs over the top of the mast and is hooked in at the top of the front side of the mast by a "knob" on the wire catching in a "groove". It was completely foreign to me that the halyard line could come back down the groove that the sail was going up, as the Nacra and many boats do. Plus I did not realize there was a big ring that was supposed to be used to catch on the hook on the mast. So that is why I now have a manual. And I understand how you feel.