I have to say that the whole wayfinder business is quite moot.

I picked up a palm pixi off ebay for $30 and it gets a GPS lock in a few seconds, while the n810 takes upwards of 45 minutes and that is with the A-GPS "cheat". There are several navigation programs available which IMO work better than wayfinder though still leave something to be desired. No carrier is required if using the hacked bypass registration firmware and I did a radio board swap to get a wifi chip (though a pixi plus would be the better bang for the buck for those that don't care about compatibility with Sprint)

It's sad to say but it's just not worth cracking wayfinder with the awful GPS chip in the N810 (yes N800 and N810 users with standalone BT GPS receivers may have better luck with the signal lock) but the truth is the maps won't be updated and for that a dedicated GPS unit would be a better choice. Or a cheap smartphone that has proper GPS software like I mentioned would be a better option than continuing this game.