You can download the updates, or you can visit a participating Garmin dealer to purchase the update on a data card.
This update enables faster map scrolling, larger guidance arrows on maps, better GPS acquisition time and faster route recalculation.
Although thanks for the reminder to update the firmware. i tried the sd card way and the unit dosen't use the new map, can You post the sd cards "disk lable" mabe that is were the problem is, it may need to see the correct lable to use it. What you have to do is connect the GPS device to your computer with a USB cable and then copy files from the download and replace them in the MAP file on the GPS device one by one.
also mabe you could try to use ultra iso and create a disk image for us to try. My base map is now v 35; my detailed map is now v 37; my AAA data version is now 7. Road Mate doesn't have enough memory for US48and US48I used the copy and paste method as opposed to the SD method.
Copy the contents of COPY_GROUP 2, 3, 5, 7, 8 to MAP 6. Once copied over, unplug the unit and it should reset itself.
Copy the contents of COPY_GROUP 4, 6, 12, 14, 15 to APP (NOTE: in order to copy the contents of group 14 over to the APP folder, you will need to copy the contents of TNShell_Bitmap Venus2 to the same folder on the unit, that way the folder isn't just replaced.) 7. Then all should be working DON'T FORGET to put in the UNIT_ID.