First of all, you need to open the wave file that given by Jess. Then find a pattern or make your own one in rhino. For my wave, I got it from google. The I opened it in illustrator and click live trace and remember to put no fill in colour in the colour pallete. after that save the file and import it to rhino. Type project and click the object you would like to projected on the surface. Remember to project the lines from top view. otherwise it wont get projected. Press f10 to change the depth of the curve line and adjust it as you like and thats it. File is ready to be cut.