@Fragos I think I may have figured out my problem. It seems to me that your "How To" is ambiguous as to whether A-GPS is for only the N810; I have an N800. (If that's the problem, it probably seems obvious to anyone who understands what A-GPS is doing; but just reading the How-To, to an N800-owner it seems like it could possibly help get the bluetoothed GPS fixing faster, also.) My bet now is that my dumb error was trying to install it on an N800 in the first place.