[I should've known better than to mention more than one topic in a single post, so here is my original question again.]
I've read how certain of the high-end models of detectors can be "software upgraded" (which I assume means reprogramming an EPROM) but no one has ever explained how this is done.
As en engineer and programmer I am comfortable doing things like this, and I am wondering if it is as simple as downloading a firmware patch from the BEL/Escort/Valentine website and burning it on an EPROM and popping it in the unit? It really could and should be that simple. In fact, I would like to see detectors with firewire or USB ports so that you can plug them in your computer and upload the firmware, much like flashing your computer BIOS to a later version.