I'll contribute, too. I'll bet there's some kind of key embedded in the data that prevents it from working with our units. I hope I'm wrong.

Looking at the raw data from our disks, I can see some patterns but not enough to decipher the format. It doesn't look anything like Navteq's GDF. Has anybody else gotten any further? I really think our best bet long term is to be able to roll our own updates.