This is a couple months old, but; If you're driving down a road charting wireless, it's not going to make any difference how accurate your GPS is. You're on the road. The only way to get accurate is to drive up each and every driveway you think was a hit. That's pretty much what I do. To get better...

lol, pointless much?

yes, I tried when I originally got my i730. I played with it for hours (under windows, so no GPSD) and never really got much out of it. The GPS dosent seem to want to talk much, and when it did, it wasnt reliable. My position would shift as much as a half mile when sitting out in the parking lot at ...