Have you tried "fltplan.com" yet? They have a template for most singles and twins that is already set up and works flawlessly. And there is no charge to sign up or use the site. I believe Garmin both fltplan.com a few months ago, but I have seen no bad changes, only good changes. Once you set your aircraft profile which you can change yourself or use one of there templates for flight planning, you will be amazed at how it works. This is one of the few feeebies around aviation at least for now, and I hope Garmin doesn't screw it up.
Dick Welsh