Wendy,
Go to the telenav site (
http://www.telenav.com/campaign/inde...3589sx8pi5ai43)
Download the program for the treo 755. They have you sighn up with a credit card for $10.00 per month. Check on the sprint site and see what plan you have for sure and what is included. I had started with the $15.00 unlimited web plan. I found if i signed up for the $25.00 plan it included the web navagator, So for the extra $10.00 per month i found i can have everything.
Get yourself a gps receiver and it is real easy to set up and use.