However, there are several files in the download. There is a cfg82a4.cfg, OS82a4.img, boot82a4.bld, and a btl82a4.bld file. Do I just dump them in the root of the SD card and start up the unit?
How can I back up the existing firmware before I attempt to update it?
download and copy the system files into ur memory card (2gb or lower GB) then restart ur GPS wil do and follow the instruction. it will ask you to touch the calibration.