Hi ErMonter, your experience with this may be valuable to solving this issue. It's clear that the individual fw [be it US or EU] does not contain voice files [as such] of course. What is needed by ppl wanting to use US units with EU fw is a method to load the voice file/s. Without them any Garmin device will be 'mute', including all modern units and older ones closely related to GW navis such as StreetPilots. Those can be flashed to the correct region [region 11 of nv?] with voice files made as *rgn files via updater.exe or even further packed as *.exe. That isn't possible with GW navis afaik, but is there a EU 'language pack' of some kind, issued as an update perhaps, that could be flashed after the EU fw has been loaded? If such a pack exists, It was probably issued as a gupdate.gcd, just as carlinux mused in Post #99 for loading voices using a 'temporary gupdate.gcd'.