I have downloaded GPSActionReplay... I already had the Java Run Time installed so it was quite easy to install. I am running WinXPro and had no problems. The generation of the polar diagram is really nice.

It would be cool to take several boats... H16, F16, F17, F18, N20, A, T, etc. on a consistent wind day and have them go through a couse intended to fill out the polar.