I managed to make a mess of my Alpine W920R. Deleted a file and that was the end of that. Talked to Alpine in Uk and they emailed me the files to put it all back together again. The software is sound but it does not like being played with. You can download from this site the Autoexec file that lets you into the Alpine Sat Nav by putting the files on an SD Card and starting your sat nav. It will go to the WinCE screen. You need something to touch the small screen buttons with so a tooth pick or similar ( Please not a pen ). Most of whats on the screen should make sense. If it doesn't you should not really be playing around. Any files you want to copy into the sat nav should be on your SD card as you cannot take it out and put another one in. If you plan what you are going to do ie. Add new POI's and Icons then it is better to put the icons in one directory on your SD Card and the Kml files in another directory. You can also add the Speed Camera txt file to a separate directory as well.

One you are in WinCE Explorer you can move round the various directories on the FLASHDRIVE and the SSMDD Drive. Flashdrive has all the Alpine program files on it. If you navigate through Alpine - Content - Userdata - POI you can add your Kml files here. Look for Alpine - Content - Userdata - Usericons and put your bmp files here.
A word of warning. Be careful with the Bitmap files. 22x22 works ok but if you use anything that has been converted from something else the Alpine will throw a wobbler when it tries to load it. You can design your own bitmap files using paint or another program. I had some png files which I converted online to bmp and they add alsorts of things to the file like web names and other junk. It's this that upsets the sat nav. Alpine - Content - Speedcamera is where you put your Speed Camera txt file. Delete all that's in the folder and just add the single file. The Alpine will build the other files for you. If you don't remove the other files it just adds the new information to what's already in there.