Crystal Report XI create Gannt chart by quarter or display x axis quarters

Hello all, I have just about given up on this one. I thought it would be simple.

I have a database that i need to report on by quarter. It has a project name and implementation date. All I need to do is display the project name and the date in will implement. I have this part working. I need to convert the x axis to display by quarter instead of month year. Any help you can provide would be greatly appreciated.

Mike