Here is a wonderful website with the bow tutorial.
It is in another language but honestly you dont need it. The pictures are wonderful. Just make sure that you make the loops a few days in advance or they will fall when you put them together. Good luck!
You know what's funny is that I made a small cake for my sis today and was trying to make a loopy bow, I made it so big and it looked so ugly I threw it away. But funnier is that I saved this tutorial in someones last post and you think I would go back to it, but I didn't. Stupid me!
I usually build it on the back side of a cake pan the size you want it. i start with melted choc then i cut the bottom of the loops into a V-shape and start assembling.
I also use a cake pan flipped over and assemble with dried loops. I use sugar melted to the soft crack stage (I think...whichever stage you use to make a lollypop). It dries clear and I don't have to use so much to get it to stay. I also pour out some of the sugar on the smooth side of freezer paper about the size of a 3" circle and let that harden and then start "gluing" my first set of loops to that. This way my whole bow has a base to sit on.