Right i think its about time we got one back on garmin and hacked there JNX format.

Yes i know they have given us the kmz and allowed us to have upto 100 custom made tiles but in some cases this just aint good enought.

There jnx file format allows far more than than an i think we should all club together and start hacking the format.

I have been looking into this JNX file and here is what i have found out so far i am hoping if we all pool are resourse we can hack the whle format.

Starting with what ties you birdseye images to your garmin well if you download a birdseye image it will insert a lock down code this code can be found at 58hex to 7bhex.

If you have some one elese birdseye just remove there code and insert your own. When you load you GPS there image will now be allowed on your device.

If you look within jnx file you will also find a bunch of jpeg images look for this string of hex 00 FF E0 the image continues down to FF D9 string.
This image is the image displayed upto the 1.2mile mark. To view this image in a image viewer copy the data from FF E0 to FF D9 to another file and insert FF D8 into the first to bytes of the new file. Save the file as a jpeg image and it will load in your image viewer.

More info to come later..........