You can play the .jar files via KEmulator for PC. The page has also other emulators for smartphones.
Once you run the emulator, simply load the .jar-file (the_elder_scrolls_travels_stormhold.jar, the_elder_scrolls_travels_dawnstar.jar, etc.)
You can use http://www.javaemulator.com/java-emulator.php to run the java games (Stormhold (Tell me if you find a non-russian version), Dawnstar & Oblivion). So far i managed to play Oblivion, the other two didnt react to key input. As for Shadowkey, i havent found an working emulator yet, but this is in early development
That download you linked worked fine for me in this emulator.
The files vi, i, bg0, bg1, bg2, bg3, bg4 and br are simple png files but they're not sprites/textures, just backgrounds of some sort. I've not figured out how to export the textures and model files.
EDIT: I managed to get the texture files and the rest of the images exported, the link to the zip of the images is here. Not sure if this is the game you're looking for but that's all I've found so far.
Been trying to import the models file into java with J2ME, but it won't work.