Changing the detail map on a Quest2 unit

[Naks]

Hi all,

Not sure if this has been posted here before, search does not bring up anything related.

I bought a Quest2 in 2008 and it has limited memory. The factory basemap takes up space, which I wanted to get back.

You will need:
- An SD card (at least 2GB) or virtual SD card
- An SD card reader, attached to your computer
- Your mapset, installed on your computer and unlocked
- WebUpdater.exe (you can find in the Mapsource or Garmin directory)

1. Create an imagefile from your mapset: Start MapSource, install the mapset, and unlock it
2. Put the SD card in your computer
3. Select all the maps and send them to the SD card instead of to your GPS unit
4. Take a look at that card when it's ready. MapSource will have made a folder on it with the name 'Garmin'. In that folder you will find an image with the name GMAPSUPP.img
5. Rename that imagefile to GMAPPROM.img and put it in a folder on your computer, for convenience in C:\GARMIN\WebUpdater\
6. Open a DOS command box and go to the folder C:\GARMIN\WebUpdater\
7. Connect your GPS unit and run the following command: 'C:\Garmin\WebUpdater.exe /upload_file rgn=49 path=C:\Garmin\WebUpdater\GMAPPROM.IMG -autorun usb /i'
8. That's it, the upload will take a few minutes and the original map will be gone

AFAICT, this works on the StreetPilot 2720 and the Quest 2, but use at your own risk!

Also, please note that I did this with the previous unlocker, where the unit's ID was required to unlock a mapset. So please make sure your mapset has been unlocked with the UnitID of your unit, else once the mapset has been uploaded it will not allow you to route!

EDIT: I have been told that while the new unlocker does not require unit ID, it will still be routable on the unit, but I have not tried this yet.

I found this guide on SmellyBiker forums in 2008, not sure who the author is.