Help with Helix design

I have this part I am recreating and I need help with helix design part. I am unsure of how to acheive the same result. Any advise or how to or any explanation would be greatly appreciated. I have been using Solidworks since 2007 and have been self taught the entire way. I am currently using 2011, waiting on 2012 release.

SolidworksDrawings And Detailing