HI all, i'm very new to mastercam amd I am trying to make a tool path for the blade section of a windmill. The file is from Mr Bean's website, http://www.build-a-windturbine.com . This is one of my first 3d parts made and i'm ready to pull my hair out. The 3d stuff I have tried so far have had a flat bottom. This being a blade section has a top and a bottom and I think thats where i'm getting into trouble, when I select the surface it also selects the bottom of the blade. Out of shear frustration I gave the demo version of Visual Mill a shot and it did it perfect the first time and it only took me 10 minutes to do it but being the demo I cant post it! I know MasterCam should be able to do this but being so new to it i cant figure it out. Anybody want to give me a hand with this one?

Thanks
Darren