i just performed the upgrade on my HDS 5 last night, using a 2GB Sandisk card, and it worked fine.
remember, you have to run the exe file after you download it, you can’t just copy that onto the card and start the unit up.
1. download the file
2. run the file on your PC
3. it will prompt you to specify where to save the files it is about to extract.
4. click browse and choose your SD card that is currently plugged into your PC
5. click next, and it takes about 5-10 minutes for it to extract all of the data onto the SD card and finish the setup.
6. when its done, unplug the SD card from your PC
7. Make sure your graph is turned off, plug in the SD card
boot up your graph
8. the upgrade should start automatically, and takes about 5 minutes.
9. after doing the upgrade, on the first bootup, it will prompt you to do the “first time setup”, i just selected no. and i checked all the settings, and it retained all of my custom settings and waypoints, etc, after the upgrade.
one piece of advice, i would perform a backup of your waypoints/trails/routes before doing this….Just in case…
to do that, put a blank SD card in your unit (you could use the same 2GB card you will do the install with, there will be plenty of room on it for everything)
press the pages button until you get to the last option( i think its “files”) and from there you can export all of your data. just in case the unit bombs during the upgrade, you will have a backup of everything.