As a user of iBlue (MTK) 737 I enjoy 5Hz data from the unit to my Nokia e65 using Sygic navigation. Yet, after a hard reset (power-off or battery removal) I'm defaulted to 1Hz which doesn't provide smooth navigation. I got several PC software that by Bluetooth re-enable the 5Hz but was looking for a Symbian soft to provide the same service. I searched around google quite heavily without any success.
Normally, for your phone, just copy the '.jar' file to your phone and open the '.jar' file with the 'file manager'. The phone should propose you to install the program.